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Fake or Real black quartz crystal?

Posted by Peter Miranon  
Re: Fake or Real black quartz crystal?
March 05, 2010 03:09AM
Alfredo Petrov is right in saying that all smoky quartz is irradiated, most times by nature, but I insist on my comment that most (or maybe all) artificially irradiated smoky quartz is made out of colorless quartz, normally coming from metamorphic rocks, and showing a more homogeneous chemical composition, whilst the bulk (in terms of size and tonnage) of natural smoky quartz come from pegmatites (and the main producer area in the world is the pegmatite province of NE of Minas Gerais, Brazil), and on this environment smoky quartz has a more variable amount of chemical impurities (Mg, Al, Fe, etc) what results in at least slight color variations inside the crystal when it is submitted to natural radiactivity inside the pegmatite, so the presence of lighter and darker internal zones, or changes from yellowish-brown to orange-brown to near black-brown suggests that one specimen is more likely natural than irradiated.

Luiz
avatar Re: Fake or Real black quartz crystal?
March 06, 2010 12:14AM
    
Luiz,
In my humble opinion, you are correct.
Inconsistencies could help in identifying natural, verse artificially irridiated quartz.
Re: Fake or Real black quartz crystal?
April 14, 2010 12:34AM
For what its worth, there are quite a number of Chinese dealers on ebay now who look "reputable" because they have a few thousand feedback. If you look back at their feedback, the first thousand are so are from Chinese buyers. Most of these scammers are selling quartz from anywhere with all the appropriate key words attached to them to make people look at them. 99% of the stones they sell come from China or Brazil, but they claim they are from under locality under the sun. And many of them are foolish. There is one guy aximi and or gem-crafters (same guy, same hand n photos) who puts pictures of "the mine" from where the quartz came from, and he has the same picture on auctions for crystals from two different countries.....or shows a picture from "Bor Quarry" which is a cliffside with holes in it and no quarry to be found. Ebay basically encourages these dealers to do what they want, and has no interest in trying to stop them because they profit from them. When in doubt, don't buy anything from Chinese dealers on ebay regardless of their feedback.
R.S.Taylor
Re: Fake or Real black quartz crystal?
April 29, 2010 03:27PM
It looks Chinese and if it's from China it's probably smelted quartz which is nothing more than colored glass. A good rule of thumb, is if it's cut and polished from China don't buy it.
alven
Re: Fake or Real black quartz crystal?
October 18, 2010 12:43PM
that's correct! i have a smokey quartz crystal charm bracelet - the beads are shinny but not faceted. there are visible flaws in some beads and only the light of the sun can reveal it's natural reddish to dark brown color. :D
JohnSmitt
Re: Fake or Real black quartz crystal?
June 26, 2012 01:29AM
I bought 2 pieces of tiger eyes. One from china and one from the state on eBay are fake. Both of them have wood inside. If anyone wear a cheap tiger eyes from eBay that I know of, they are fake and don't know yet.
Re: Fake or Real black quartz crystal?
June 29, 2012 10:46PM
I see these ebayers ALL the time on ebay. It is VERY suspicious when theyre selling their item for .01 cent on ebay and 15$ shipping across continents. VERY SHADY! Selling their "crystal" for nothing draws red flags..it basically means they are a HUGE dealer of these, which could mean their products are fake. Thats just my 2 cents.. im a HUGE ebayer. Ive had lots of success from china though. If you want some SOLID ebay user ids from other countries PM me.
Re: Fake or Real black quartz crystal?
July 22, 2012 06:58PM
I have a smokey twin that is around 12in. x 14in. collected in lake george colorado I would sell you, but also there are many miners in my area pulling out good real smokies everyday.
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avatar Re: Fake or Real black quartz crystal?
July 28, 2012 01:30PM
Interesting thread.

I went to SMAM 2012 where, shall we say, Quartz in all qualities and sorts was not in short supply. I saw one display of "Citrine" that intrigued me. That these were smallish, naturally formed, Quartz xtls seemed beyond doubt at a glance, But all of these xtls were 'burned' smoky-black at the tip of the termination and also at some of the other facet junctions. These were being sold (very modestly priced) as natural Citrine.

So what had been going on here? A botched attempt to produce Citrine from colourless Quartz through over-irradiation? Or an attempt to produce Citrine from Smoky Quartz through heating? My guess would be that it was a result of an irradiation process; it seem logical that, in either process, colour change should first occur where the material has the least depth, this in turn producing opposite effects with the alternative processes, Only the irradiation process could give/leave the burned tips, The effect (and deduction) is not unlike considering an Alaska Bake that had been flashed with a blowtorch just before serving, to partly carbonise the tips of the meringue casing.

Natural or artificial irradiation? Again a guess, my inclination would be to artificial radiation, 'high and fast' seeming key to producing this blowtorch effect.

Anyone else look at this and wonder? Sadly, I took no pics.
TonyA
Re: Fake or Real black quartz crystal?
June 04, 2014 08:12PM
Hello,

do you think those clear quartz crystals are fake?
Please advice! Thank you in advance

[www.ebay.com]
[www.ebay.com]
Re: Fake or Real black quartz crystal?
June 04, 2014 08:56PM
    
Tony
Sorry, no way to tell from just photo's, there cut stones, if there stones, can't do any tests on them confused smiley
Re: Fake or Real black quartz crystal?
June 11, 2014 02:47PM
Location,location,location. There are many naturally occuring dark smokey quartz on the market. If it is Brazilian it is probably real. They have no particular need to "make" smokey quartz. However,if it is dark and from Arkansas then odds are 99% that it has been treated.
avatar Re: Fake or Real black quartz crystal?
June 18, 2014 09:10AM
Can't tell from the photos, but they are probably natural quartz. There is still plenty of cheap quartz rough out there from which to cut such small stones and Im sure it is cheaper than synthetic quartz. Of course it could be just glass.

Rock Currier
Crystals not pistols.
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