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Fakes & Fraudsheliodor from tajikistan
4th Nov 2011 23:45 UTCbob kerr
IMPORTANT NOTE: This is now known to be a fake locality name made up by dishonest dealers. It is believed the yellow "Heliodor" crystals claimed to be from this locality are heat-treated Pakistani beryl.
and have to take serious issue with whoever posted this. heating aquamarine does not cause it to go to yellow - period. heating aqua is frequently used to remove the greenish tinge to make it bluer but it will not turn it yellow. further heating will actually even remove the blue. this need to either show the evidence for this statement or remove this post.
now - irradiation of aqua. this does indeed tend to make aqua yellowish but there's three problems with this also. 1 - take a look at the attached photo of vivid yellow beryl in direct association with white/milky quartz. if this specimen were irradiated the quartz would turn dark/smokey. 2 - however there may indeed be a gamma ray energy spectrum that if it could be properly colmnated and focused on the beryl only could account for yellowing - but is this something you would expect from this area of the world - or even the states or europe for that matter?? i think not. 3 - irradiation of aqua typically results in a brownish yellow - not the vivid yellow found in these specimens.
finally - concerning the mine name - calling a mine one name to confuse or keep intruders out is not unscrupulous at all - it's done all over the world including here in the US. this is a meaningless critique.
so - to me the jury may still out concerning these but i have no evidence to think these are anything but heliodor from some location in or around tajikistan.
can anyone else show real evidence to the contrary? i, and others would appreciate it. inuendo and hearsay need not respond.
thanks
5th Nov 2011 00:08 UTCJolyon Ralph Founder
However. They are most certainly (at least the ones I have seen) simply treated low-grade Pakistani and/or Chinese aquamarines.
Despite the suspicious nature of these no-one has been able to give one shred of evidence that these things are genuine.
Please read the article by Dmitriy Belakovsky in the English ExtraLapis Vol 7 "Beryl and its Color Varieties" (p61)
The locality "Zelatoya Vada" doesn't even exit.
Until we get some firm evidence to prove these are genuine, the statement on that page stays.
Jolyon
5th Nov 2011 00:16 UTCRob Woodside 🌟 Manager
5th Nov 2011 01:58 UTCbob kerr
and in your statement "simply treated low-grade aqua" - treated with what??
and i just don't think that a "fake locality name" implies anything - is "gelte krustle mine" also a fake location? (in AZ we have the pure potential mine, the barking spider mine among others - simply names given in part to conceal the locality).
and i think you can also say that; "despite the suspicious nature of these, no one has been able to give one shred of valid evidence that they are not real". (based on john white's article in R&M)
i don't have access to dimitri's article - could you please provide a brief synopsis? is john's position invalidated by dimitri?
thanks,
bob
-------------------------------------------------------
> Thank you for raising this - the statement that
> they are "heat treated" was certainly inaccurate.
>
> However. They are most certainly (at least the
> ones I have seen) simply treated low-grade
> Pakistani and/or Chinese aquamarines.
>
> Despite the suspicious nature of these no-one has
> been able to give one shred of evidence that these
> things are genuine.
>
> Please read the article by Dmitriy Belakovsky in
> the English ExtraLapis Vol 7 "Beryl and its Color
> Varieties" (p61)
>
> The locality "Zelatoya Vada" doesn't even exit.
>
> Until we get some firm evidence to prove these are
> genuine, the statement on that page stays.
>
> Jolyon
5th Nov 2011 02:11 UTCbob kerr
to me, heating is simply out as a possible treatment - unless i can see evidence that contradicts experiments that i've seen conducted.
bob
11th Nov 2011 16:14 UTCJolyon Ralph Founder
We believe the locality given is fake based on many discussions with experts on minerals from the former soviet union, experts on beryl etc.
The majority of specimens, including specimens on matrix, attributed to this locality are without doubt specimens of beryl from pakistan and some (unmistakably) from Ping Wu in China which have been irradiated.
This does not mean your specimen is from this source. It may well be a genuine heliodor on matrix, but perhaps from an alternative locality.
It is of course possible that your specimen is genuine and is genuinely from this locality, however because of the serious doubt about the validity of this locality we would need some fairly impressive evidence as to the provenance of the specimen before we could say with any certainty that true heliodor comes from that locality.
Dmitry Belakovsky, who wrote the article in ExtraLapis, is curator at the Fersman Mineralogical Museum in Moscow and knows more about former soviet mineral localities than most people.
Story goes something like this:
An American dealer shows yellow beryl to him from "undisclosed locality" in the eastern Pamir mountains of Tadjkistan. Asks him where they could be from.
He says he told the dealer that IF they were from the eastern Pamir then they MAY be from Rangkul as there is a well-known gemstone area near Rangkul Lake.
He took a specimen in trade for the museum, and showed it later to Anatoliy Skrigitil - who had spent many years working and collecting in the Rangkul area - discovering many gem localities in the region. Anatoliy explained that Dmitriy was wrong, heliodor had never been found in Rangkul or anywhere in the Pamir - the only possible locality was the pegmatites in Kyrgizia.
More material came onto the market, suspiciously always through western dealers, never through Russian dealers, but now the locality was adjusted to "Rangkul, Pamir Mts, Tadjikistan" - the very (and incorrect) locality that Dmitriy had guessed at.
The mine name "Zolotaya vada" or "zelotaya vada" came at around this time, oddly a Russian sounding name (in a non-russian region) - and is clearly a distortion of the Russian words for "golden water".
All attempts to track down the mine, or any trace of workings in the region have failed, both from discussing with locals and with the regional experts.
He adds
"I have visited Rangkul area and have seen first hand how difficult if not impossible it would be to hide mining activity on the barren landscape".
Jolyon
11th Nov 2011 20:45 UTCbob kerr
this issue continues to confuse me. real evidence seems lacking and it wouldn't surprise me at all if many of the loose yellow beryls are indeed irradiated aquas. the matrix pieces however cannot be so easily dismissed - especially ones with quartz or clevelandite in association that are not darkened. but then again could the radiation treatment be electrons rather than gammas? (electrons can be more easily focused.) would this result in yellow beryl but not darkened quartz?
and concerning the given locality name(s) - this also seems inconclusive as there are lots of examples of a false locality given to hide the real locality from claim jumpers. so rangul appears not to be the correct locality but that locality could've been chosen as semi believable and to send someone on a wild goose chase. this to me is not sufficient evidence to declare them guilty.
i share your skepticism - but i also would like to have someone more knowledgeable than i explain to me my two heliodor specimens with white quartz in association (there are others out there also). this to me seems the strongest evidence that they are real heliodors and unless i see strong evidence otherwise (not just that the locality is fake) i'm gonna consider at least these two as real. and if these two are real then there's no doubt many others (loose xls) that are real - but no doubt mixed in with others that are irradiated.
i guess the discussion will continue.
bob
13th Nov 2011 18:19 UTCTim Jokela Jr
-----------
Surprised nobody has jumped on the above statement. Lying about a locality IS unscrupulous. Doesn't matter if "it's done all over the world". It's fraud, and a real pain in the ass for the whole community. Let's not encourage the bullshit artists that do it.
T
13th Nov 2011 19:58 UTCJolyon Ralph Founder
As I said before, there is a good chance your heliodor on matrix may be genuine.
However if it is, it's most likely from Brazil or another locality, not from Tadjikistan.
Jolyon
14th Nov 2011 15:25 UTCbob kerr
http://www.mineral-forum.com/message-board/viewtopic.php?t=366&postdays=0&postorder=asc&start=0
thanks,
bob
14th Nov 2011 15:35 UTCbob kerr
i think the real unscrupulous occurance is when someone intentionally claims that the specimen is from tsumeb, for example, in order to demand a higher price - which is what i think you are implying also.
thanks,
bob
14th Nov 2011 16:05 UTCAlfredo Petrov Manager
14th Nov 2011 16:37 UTCDavid Von Bargen Manager
Technically, you do need to have quartz that has a relatively high aluminum content to generate a smoky quartz on irradiation. If there is a subsequent heat treatment (to about 350C), the smoky color will be bleached out.
It's one thing to be a bit vague on the locality, or rename a mine/claim (which eventually comes out) versus an outright lie about a locality. Eventually these things will end up in a museum and be studied scientifically. The science can be severely messed up if good locality data is not available. I have gotten supposed Arkansas diamonds that were in fact probably from South Africa. If these had been used in studies, they would not only have polluted the scientific literature, they would have resulted in a complete waste of the researchers time.
14th Nov 2011 19:39 UTCbob kerr
"and for heating smokey to clear it up - wouldn't this also impact the heliodor? there's lots of demonstrations of treated aquas and heliodors going to goeshenite with heating. the question is one of the right temperture and duration to clear the quartz and not clear the heliodor.
a friend of mine is gonna try an experiment with this - heat both smokey and heliodor and attempt to see what happens. it may not be the exact case but should be instructive."
sorry,
bob
19th Dec 2011 13:52 UTCSalvatore Natalizia
21st Dec 2011 12:40 UTCAnonymous User
25th Dec 2011 06:32 UTCRock Currier Expert
31st Dec 2011 00:58 UTCCraig Mercer
My suggestion would be to give outstanding specimens such as the above a seperate area (within the database) for further investigation in the future, by those who are interested of course, with the hopeful outcome of being one day able to add the specimen to the database with confidence, or alternatively boot it down the bottom to the BM's area ;-)
5th Jan 2012 15:07 UTCPeter Lyckberg Expert
They had an incredible suite of exceptional specimens from Tadzhikistan. Many of them had been part of Anatolij Skrigitils collection, who was an excellent geologist.
Wonderful topay on smoky quartz, hambergites, tourmalines, gem skapolites, jeremejevites, short prismatic morganite.... you name it............
Even ruby crystals in matrix to 10 cm from the deposits Anatolij discovered himself!
Do you think they had any elongated yellow beryls at all......???????????????????????????????????????????
Of course NOT!
They had all legitimate specimens from existing mines and small prospects !
,
16th Feb 2012 14:35 UTCOwen Lewis
In summary, this thumbnail specimen is of an elongated hexagonal prismatic crystal, green-ish yellow in colour and with one perfect termination (basal pinacoid). This crystal has very smooth general finish on all observable surfaces, permitting a reasonable quality of photomicrography of its interior without need to interfere with the specimen. This crystal is partially embedded in a white crystalline matrix (not Quartz, I'm pretty sure).
My continuing interest in this little specimen comes from its inclusions, of which there are four discrete types. One type of inclusion is common both to the matrix and the the 'Heliodor'. Two of the inclusion types are surface-breaking and this offers a clear possibility of detailed analysis and identification (will be done when I can find an interested and capable party). An examination of the inclusions leads me to conclude that - whatever other treatment there may (or may not) have been - this specimen has not been heated to any serious extent.
It seems to me that the combination of the four inclusion types, plus the combination of main crystal and matrix, should give a fair chance of identifying the locality of origin. So one might think... but, so far, I have failed in this search. The inclusion types seem to me as follows:
- Bi-phasic. liquid and solid. Solid has a white granular appearance at x130. There is some indication of incomplete 'negative crystal' formation to the inclusion's surface..
- Bi-phasic liquid and gas in a negative crystal.
- One small cluster of transparent crystals, likely of the orthorhombic system.
- Black, bladed and possibly with a green overtone. This type is seen both in the Heliodor and in the matrix, surface breaking in both cases. Actinolite?
- Orangeish-brown very fine needles of 'flattened' transverse cross section. Surface breaking. Rutile? Which has (AFAIK) never been reported as an inclusion in Beryl. Or Columblite, which is documented as a Beryl inclusion?
Some pics below. All suggestions as to the possible types of inclusion and localities where the combination can be found will be very welcome!
16th Feb 2012 18:03 UTCJason Evans
http://www.ebay.co.uk/itm/8-0ct-6pcs-Natural-Terminated-Clean-Heliodor-Beryl-Crystal-111737-/320796270923?pt=LH_DefaultDomain_0&hash=item4ab0f2a14b
Although they are not from Tadzhikistan I am now suspicious of all helidor.
16th Feb 2012 18:14 UTCJason Evans
http://www.ebay.co.uk/itm/788ct-2-1-Gem-YELLOW-HELIODOR-Beryl-Crystal-Takikistan-/130626548878?pt=LH_DefaultDomain_0&hash=item1e69f2f48e
17th Apr 2012 21:52 UTCEric Greene
Regarding the mine locality, here's what I was told by a gem dealer who brought some of this material to Tucson in 2008: The mine is located in the Pamir Mountains (which are part of the Himalayas) at an elevation of 14,000 feet. The harsh weather conditions and extreme mountainous terrain make the site nearly inaccessible. To be precise, the location is in the south central part of Tajikistan, in the mountainous province Kuhistoni-Badakhshon, somewhere to the south of Kalaikhum. However, due to the severe terrain, the mine is not accessible from the Tajikistan side of the border at all (which is why no one in Tajikistan has heard of the mine). It can only be reached from Afghanistan, through the far-northern province of Badakhshan, and only during the summer months when the weather is (relatively) good. All mining supplies must be carried by mule to the mine, and the crystals are carried out the same way. I haven't seen any new crystals from the Zeylotoya Vada Mine since 2009, so I assume it is now closed, making pinpointing the locality even more difficult. I've also heard reports that the mine doesn't show up where its "supposed" to be on satellite photos. If it's snow free only 2 months of the year, perhaps this is just a matter of timing? This is a vast area, thousands of square miles of high mountains - if you're looking for a mine that is a small pit, it's worse than finding a needle in a haystack. Also, someone wrote that it's been 20 years since these appeared and still no one knows where they are from. Really? I didn't see any of these until Tucson 2007. That's 4+ years ago, not 20.
The second issue is irradiation. As discussed already, clearly the claims that the material has been irradiated are bogus. To my knowledge, no one has produced a sample of low grade aqua that has been irradiated in some unique, specialized way that comes close to the color of these crystals. When/if they do, I'll shut up!
As for heat treatment, here's what Barbara Voltaire wrote in the GIA gemology forum: "Aquamarine often has a residual greenish tone until it's heated. Why? Beryl is a beryllium aluminum silicate. Yet, none of those elemental constituents are able to cause color. Iron is responsible for golden yellow, golden green, green and blue beryl. In order to understand how minor amounts of iron impart various colors we need to know: 1. where within the atomic structure of the beryl the iron is located 2. the oxidization state of the iron. The blue and yellow color seen in beryl results from small amounts of iron situated in the channels formed by silicate ions, running parallel to the "c" axis of the crystal. If the iron present is in the 2+ oxidation state, the color is blue. If it is in the 3+ oxidation state the color is golden yellow. Combinations of oxidation states impart intermediate colors. When you heat greenish blue beryl to 450 degrees C, it reduces the iron from 3+ to 2+, therefore eliminating the yellowish cast." So, aquamarine that is heat treated will not turn yellow - it will lose whatever yellow color it has and turn blue. This fact rules out the hypothesis that the heliodor from Tajikistan has been heat treated to turn it yellow.
We haven't thrown all Tsumeb specimens in the trash simply because there are fakes out there. We also didn't reject the early Chinese specimens which were attributed to incorrect mines in the wrong province, which happened because the wholesale dealers guarded their secret sources jealously. And the theories about treatment (heat or irradiation or any other method known to the GIA) have failed to survive serious scrutiny, too.
I say, it's time to lift the ban on showing these crystals on mindat.
Eric Greene
17th Apr 2012 22:05 UTCJolyon Ralph Founder
Do you have any evidence that can be corroborated? A tale from an unnamed gem dealer (along with the helpful comment that the mine doesn't show up on aerial photos) doesn't really inspire any confidence from me.
As for irradition, it has been clearly proven that Pakistani aquamarine can irradiate to exactly the same colour as the 'Zeylotoya' stuff. I have seen plenty that has. Talk to Rocksaholics in Texas, they accidentally discovered the technique for turning Pakistani aquamarine into Heliodor in the late 1980s - I'm sure they'll make up a bunch for you if you want it.
I purchased one of these crystals (which I still own) from ebay in around 2000-2001, so they certainly go back some way, and as Dmitry Belakofsky's article in the 'Beryl' book from Lithographie states, he saw them in the mid 1990s. It's strange that you didn't notice them before 2007, but they were certainly around.
Finally, I note from your website that you have examples of this material for sale. Maybe it would have been more honest to have disclosed this fact in your posting.
Jolyon
17th Apr 2012 22:08 UTCJolyon Ralph Founder
Jolyon
17th Apr 2012 22:20 UTCAlfredo Petrov Manager
19th Apr 2012 15:13 UTCOwen Lewis
This imperialist 'great game' had little to no effect on the small local population which would have continued to love, fight and trade according to their own causes, regardless of whether they were labelled Tadjik, Afghan, Indian (since there was no Pakistan at the time of which we speak) - or even Chinese. At the political level, there are still hundreds of miles of other ‘border' in the general area that are still disputed between the neighbouring countries.
Entry to this 'Afghan' corridor from the Tadjik side is, at the Eastern end, easy and the notional border entirely permeable other than at the main crossing point for goods into China. *If* there was any mining on much of the southern faces of the Pamirs, an approach from the Afghan corridor would seem the obvious one and also (on into Pakistan) the most likely route out for the (illicit?) produce.
As for the use of the Russian language, Tadikistan was in the Russian sphere of influence for a couple of hundred hears and was an integral part of the USSR for over 60 years. Afghanistan was also in the Soviet sphere of influence in the decades leading up to the ‘discovery’ of this Heliodor. The use of ‘ethnic minority’ languages was discouraged in the USSR with most of its ethnic groups being bi-lingual; schooling was in Russian as was universal military service and the local language was commonly restricted to hearth and bed.
I have the following queries still unresolved in this matter and as they bear particularly on my own little Heliodor on Albite sample:
1. Whilst I think it's a pretty little thumbnail, its value as a well-included Heliodor crystal would not seem sufficiently enhanced to make, compellingly, it worth the trouble and expense of irradiation.
2. Though much is known, these days, about the minerals at most areas of gem mining in Afghanistan and Pakistan, I have yet to learn of a source where a comparable combination of protogenetic and syngenetic inclusions are to be found in any Beryl host crystal. I'm still reading..
3. The exposed faces on my elongated, hexagonal prismatic crystal with a pinacoid basal termination have a general planar smoothness I have not yet seen in any Aquamarine natural crystal. This is no proof of anything but it's surely not a commonplace and should further help narrow the options for any recorded source of origin.
4. So I have read, the irradiation of Aquamarine to produce Heliodor is an unstable change, being reversed by prolonged exposure to sunlight. My crystal came to me through a dealer from a substantial US collection last year. Since I have owned it, it has been exposed to sunlight every day and I have detected no colour change so far.
5. If there has been irradiation and the change proves permanent then what I have is a synthetic Heliodor which cannot be identified as such?
There is probably still as much or even more that we don't know than we do know about sources of gem minerals in terms of their number and location. I had a great-uncle by marriage who discovered what was claimed to be the largest site of placer gold on the world (in Bolivia!). The difficulty was in the capital and operating cost to exploit the site securely, it needing a very large dredge to be broken down, carried into the high Andes on mule-back, assembled and operated in a fairly lawless area. Through endless revolutions, local 'deals' and failed sets of financing and re-financing, he kept his claim alive over some 30 years before, finally, his claim was expropriated by a Bolivian govt of the day. Enormous compendium of knowledge and resource that Mindat is, I don't think that it records this site either.
But to return to 'Tadjik Heliodor'. This stuff is not appearing newly on the market any more, with only a small quantity of 25 year old stuff remaining in circulation. Either we have a scam which proved unprofitable and was folded - or else there was a small pocket discovery that was quite quickly (and illicitly?) worked out. People may believe as they will but, with respect to my little specimen, I'll be convinced when its quite particular combination of characteristics can be tied to some known Beryl source: until then, for me, it remains an open question.
Here are a couple more pics of my specimen. It is *not* for sale but for any interested to take a personal look over a glass of wine, I'll bring it with me to SMM ;-)
19th Apr 2012 15:54 UTCTomasz Praszkier Manager
your photos is a good example... Classic specimen from Pakistan - typical for aquas from there inclusions and association with albite.
As I told before people from our team visited Tajikistan and verified in person that this locality do not exist. Also local people from university confirmed that.
BTW see me aqua :-)
Tomek
19th Apr 2012 18:45 UTCJolyon Ralph Founder
Just curious...
Jolyon
19th Apr 2012 23:17 UTCOwen Lewis
-------------------------------------------------------
> Owen,
> your photos is a good example... Classic specimen
> from Pakistan - typical for aquas from there
> inclusions and association with albite.
> As I told before people from our team visited
> Tajikistan and verified in person that this
> locality do not exist. Also local people from
> university confirmed that.
> BTW see me aqua :-)
> Tomek
Tomek,
Thanks for that. It triggered a trawl through some couple of thousand images of Beryl - including yours ;-) There are (at least) 13 countries from which are produced aqua specimens with smooth planes. Of those 13, there are 3 immediately adjacent to each other (Afghanistan, Pakistan and the Xianjiang province of China). The relevant parts of these and also of Tadjikistan all fall in side a circle of about 100 miles radius.
As you suggested, the closest published match of matrix and inclusions in the Beryl to my specimen come from the Skardu district of Pakistan. Of six mineral associations noted in my specimen, there are three of these to be seen instanced in Aquamarine specimens from Skardu, though with not more than 2/6 shown as occurring in any one single crystal. A loose fit then but not a tight one. But nothing else comes anywhere near as close.
If one looks at the pretty crystals of Aquamarine on Albite from Skardu, selling now for around USD 1,000 a time, one wonders again why anyone should wish to irradiate them and sell them as Heliodor specimens with a very 'iffy' provenance? Where's the extra margin for the trouble and expense?
Rod Lavinsky has an archived photo of a mainly Heliodor crystal with and Aqua tip. This too makes me want to know more about the trigger for a blue/yellow a colour change.
20th Apr 2012 01:29 UTCJohn Sobolewski 🌟 Expert
25th May 2012 23:13 UTCTim Jokela Jr
Personally, that weird over-strong yellow color, and the fact that habit, matrix, associations, and inclusions are IDENTICAL to Pakistani aquas... and the ubiquity and ease of gem treatment, even at the source... I sure wouldn't pay more than ten bucks for one.
26th May 2012 02:31 UTCJoseph Polityka Expert
I have a miniature of one of these on matrix and I find it captivating, real or fake. I already bought and paid for it years ago so there is nothing I can do about it except change the label to state: "Beryl, possibly treated to change color, locality undetermined, possibly an enhanced and treated beryl from Pakistan". Or how about this which is just as plausable: found in a construction dumpster which was adjacent to a construction site at the corner of 47th Street and Broadway in New York City very near the site at which the famous "Subway Garnet" was found.
Just kidding; have a nice weekend.
Best,
Joe
26th May 2012 17:24 UTCOwen Lewis
-------------------------------------------------------
> Personally, that weird over-strong yellow color,
> and the fact that habit, matrix, associations, and
> inclusions are IDENTICAL to Pakistani aquas... and
> the ubiquity and ease of gem treatment, even at
> the source... I sure wouldn't pay more than ten
> bucks for one.
:-)
Have you ever handled one?
The colour is not 'over-strong' Indeed from photos pubished there is a range of color saturation and at least two crystal habits that are 'attributed' to Tadjikistan.
No two crystals are ever 'IDENTICAL'. That *my* specimen has fair similarities in form, matrix and 2/6 inclusion types to some Aquamarine Beryl from Pakistan is true. Have you looked at satellite imagery and the political geography? In a single geological region, and within tens of miles of each other (and sometimes without certain political borders) you have China, Afghanistan, Tadjikistan and Pakistan). That crystals formed in this geological and political cauldron have similarities speaks more to probability of an origin within that general area that it does their formation under any particular political jurisdiction.
The possiblity (probability?) that these crystals are Aquamarines irradiation treated in Pakistan can't be ruled out but neither has it been shown to be so. One has only 'proof by repetitious allegation'. There is, AFAIK, not one shred of evidence.
I confess to finding the argument 'Big Endian/Little Endian' There are some very handsome Beryl specimens. That they attained their colouration through the intervention of Man remains - after more than 20 years! - only allegation. That their actual source point(s) in the ground has never been established is also true.
If it is so, that they are irradiated high quality Pakistani stones, I do ask myself why. Would they be worth less had the origin been claimed as Pakistan or any of the other of the four adjacent countries? Given the good prices fetched by high quality Aquamarine specimens from Pakistan, where's the evidence that the 'Tadjik Heliodor' is sold for a premium over it? Treatments are normally applied to make the unsaleably bad 'commercial. Or to to improve the value of a poor stone by at least several multiples or perhaps even more.
I'm happy enough to enjoy mine for what it is and for the pleasue it gives me. Still not fading BTW ;-)
27th May 2012 17:59 UTCAnonymous User
One of the most common stones to be irradiated is beryl. Morganite and yellow(heliodor) being the main ones. At the Embrarad in Brazil they do it every day with material all over the world. Mauricio Favacho, who was the chief officer at Embrarad's Gamma ray(cobalt-60) gems lab, even states they got much of their beryl from the pakistan/afghanistan area to irradiate.(he was speaking in regards to morganite but heliodor would apply as well)
.
There lab quotes..."Is the CBE-Embrarad gamma(60Co) facilities processing tourmalines, kunzites, and beryls colors?
"The gamma process have been succesfully applied in morganites, Heliodors, and green beryls,and a special kind of topaz from pegmatitic origin, for decades."
Vietnamese aquamarines and heliodor....same crystals just one has been irradiated!
http://img842.imageshack.us/img842/87/37944166025739219446302.jpg
Here is a picture of some irradiated heliodor from Embrarad
http://img703.imageshack.us/img703/7287/023xxd.jpg
Each one of their gamma ray facilities can process 200 million carats a year of irradiated material. They have 4 of them(800 millioncts.) They have been doing it for decades. They can do crystals!
Goshenite, when irradiated to yellow or gold, is color stable!
If I am not mistaken, natural yellow bery/heliodor WILL fade when exposed to long periods of sunlight.
So by your crystal not fading that would be more indicitive of a irradiated heliodor!
27th May 2012 21:31 UTCRob Woodside 🌟 Manager
28th May 2012 01:28 UTCOwen Lewis
1. A small team of knowledgeable minerologists visits a huge, wild, remote and substantially unpopulated area and talks to a number of persons well established in the gem trade, none of whom indicate to them knowledge of a mine in Tadikstan where Heliodor exists or existed. This is way short of proof that no such mine ever existed. Proving a negative is notoriously difficult and very often impossible. It is equally clear that in over 25 years, no trail to the perpetrators of a fraud exists. The reasons why are quite likely to be the same in either case:
- That persons with knowledge of the one situation or the other have either not been interviewed
or
- That persons interviewed found it not in their interest to provide truthful answers. It is not an uncommon situation that truth (or the whole truth) frequently not to be told and most frequently not to interlopers from an alien culture.
The only certainties seem to be that:
- There is no proof of any source of Heliodor having existed within the generally accepted borders of Tadjikstan.
and
- There is no proof that a fraud has been perpetrated despite some 25 years of enquiry into the possibility.
2. As you show in you post, Jason, and in the writings of others too, here and elsewhere. There is clear evidence that Aquamarine can be altered into Heliodor by irradiation. The science behind this is easy to accept since all that is required, AFAIK, is a change in the ionic charge of the same chromophore atom (Fe) present in both varieties of Beryl. However, I have not learned of an explanation of how Beryl, var Goshenite (colourless) can be coloured yellow by irradiation. What is the explanation for this? If any gathering here have such knowledge and would care to put it here, that could only be helpful and I, for one, would be better informed and obliged for it. Besides, others have argued here that the source material must be Aquamarine from Pakistan. So which is it?
3. In either option outlined at 2. above, there is no evidence that any such thing has been done in the case of those specimens originally claimed to have originated in Tadjikistan. That something *can* be done, may be beyond doubt. That it *has* been done in the case of the 'Tadjik' Heliodor is a separate issue and, as yet, there is (AFAIK) no evidence that it has been so.
There's no 'axe to grind' here, Only curiosity and a search for sure knowledge in the pursuit of truth.
As matters presently are, they have something of the feel of the Ametrine history. Because the locality of any mine producing Ametrine was unproven and with the knowledge that it could be artificially produced by differentially heat-treatng Amethyst (which itself may be synthetic), some pronounced that all Ametrine must be treated Amethyst. We now know that this is not the case. Given that 'Tadjik' Heliodor ihas not been, for a long while, brought freshly to market, it seems unlikely now that there can ever an absolute resolution of this new but similar controversy . Proof by assertion will not do it.
28th May 2012 01:36 UTCRob Woodside 🌟 Manager
Some aquas are so pale they could be called Goshenite and they might have enough Fe for the colour change.
28th May 2012 01:44 UTCAlfredo Petrov Manager
28th May 2012 03:23 UTCOwen Lewis
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> Owen, It sure sounds like you have an "axe to
> grind".
>
> Some aquas are so pale they could be called
> Goshenite and they might have enough Fe for the
> colour change.
Rob,
I'm as content whether this matter is decided one way or the other or left unresolved. I merely point out that those who would claim categorically (from either of the opposite views) that the matter has been properly proved must be mistaken in that certainty. However, proof and belief are two different things. All are free to believe as they choose but we should not confuse our belief with a proven case. In so far as there is value in this discussion it is because of this broad point, much broader in its import and application than this little issue.
Pale Aquas...... This is another way of saying that there is only a change Aquamarine to Heliodor by varying the ionic charge in whatever little Fe is present? And nothing to say on the claim that permanency is only attained by the near or complete absence Fe?