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Moldavite real or fake?

Posted by Cheng Tan  
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Alexandru Serdeliuc March 04, 2014 07:22PM
Hello Owen,

I try to figure if my moldavites are real or fake, i don't know how to do that.
What do you think in regards my previous pictures, are those fakes or could be real ones? Was purchased through an website from Czech republic, czechmoldavite .com, not sure if they are reliable or not.


Best regards,


Marc
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Doug Daniels March 04, 2014 08:53PM
The infrared photos may or may not be helpful in distinguishing fakes from real. Remember that your camera wasn't designed to record infrared (focusing changes because of wavelength, for one), although the sensor will record an image. The regular glass did not become transparent in IR; it already was. You just aren't getting colors recorded, only bright and dark (look at the top rim of the glass - it is dark in both regular and IR). As far as the possible moldavites - could just be surface geometry not bouncing enough IR back to the camera; in regular light, parts of the stones are also very dark. A better test with IR would be similar to a thin section - or at least taking a photo in transmitted light through an IR filter, not reflected light. And then, it would depend on what wavelength of IR is used, and how the filter/camera sensor responds to that....not so simple.
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Alexandru Serdeliuc March 04, 2014 09:04PM
Hi Doug,

Indeed, IR photo is not good enough to evaluate the stones, but what about other photos posted by me? I didn't saw any real moldavites so i cannot compare with anything else, the color seems to be right, it have an very irregular surface, but how to be sure?
Is there anything I can do to discover if those are fakes or not? Or I need to go with them to an jeweler to evaluate them, they can?

Many thanks,


Marc
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Owen Lewis March 04, 2014 10:12PM
Alexandru Serdeliuc Wrote:
-------------------------------------------------------
> Hello Owen,
>
> I try to figure if my moldavites are real or fake,
> i don't know how to do that.
> What do you think in regards my previous pictures,
> are those fakes or could be real ones? Was
> purchased through an website from Czech republic,
> czechmoldavite .com, not sure if they are reliable
> or not.
>

Marc,
Then you need either to learn what is necessary or else to trust to the opinion of someone who has tested your pieces - and others besides. Mineralogical theory alone cannot sort this for you.

Being frank. your photos are not sharp enough, are without appreciable magnification nor illuminated with sufficient skill to pass any opinion of weight, That said, what I can see looks good to me - in so far as it goes.

I don't think that, since moldavite is not a mineral in the strict sense, mineralogists - other than those who collect or deal regularly in the stuff can help much. The same applies to the bulk of jewellers, because moldavite is a collectors' item has and has no place in mainstream jewellery. Most jewellers will never have handled a single piece. Glass is not commonly held in any esteem :-)

If you cannot find someone local to you who knows the stuff and will look at yours and give a short report for free, you are welcome to PM me for further help.



.
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Frantisek Funda February 05, 2015 09:35AM
There are photos of lechatelierite in moldavites:
http://www.aboutmoldavites.com/lechatelierite-in-moldavites/



Edited 1 time(s). Last edit at 02/05/2015 09:35AM by Frantisek Funda.
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Moldavite worried February 13, 2015 09:12PM
I keep hearing the same answer over and over again about finding out if my moldavite is real. I have looked at all the pictures on the internet, but it is still very difficult to tell if any of the pieces I have brought are fake. I was trying to ascertain how good are fakes now? I mean my moldavite looks like the real thing, but how good are the fakes now? I mean some of them are just blatantly fake, but has anyone seen really good ones that totally look legit, but are fake? I saw on one website something that looked like a real piece to me, but was labeled fake. It looked exactly like a picture I saw that was labeled real moldavite. Any help would be great. I was also wondering about this syrup deal I read about ealier? You mix sugar and water together and you can put your moldavite in there to see if it has bubbles? Any further information on this would be great.

Thanks.

Ant
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Alfredo Petrov February 14, 2015 12:54AM
There is nothing magical about the sugar syrup, it is just (in my opinion) the easiest optically dense liquid for immersing specimens in to better see their inclusions. Gemmologists have liquids that are higher in refractive index (and therefore even better for looking into stones), but those liquids are all either oily, stinky or toxic, and expensive, so I use concentrated sugar solution (syrup). Put into a glass dish, shine bright light up through the specimen, and look at it through a binocular microscope. If your stone is a true moldavite, you'll see worm-like inclusions of lechatelierite (aka quartz glass). They are quite distinctive; once you've seen them you'll quickly recognize them again.
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Danny Bean March 31, 2019 02:54PM
I never heard of moldavite until i watched a show last night and seen them. Anyways when i was a child about 8 years old i was playing in a stream like kids do flipping rocks looking for crawdads and i found this big green chunk of i thought was glass but thought it was neat so i kept it. Im 43 years old now and still have it today. It never really crossed my mind that it coukd be anything else but glass. But i always wondered why it was so thick i. Never seen glass that thick before and it is green with bubbles in it. Its a big piece id say 6 inches by 4 inches and pretty heavy ill have to take pics soon as i remember where i put it. But deffinetly going to hunt it out snd see if its moldavite or just a big piece of green glass.
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Wayne Corwin March 31, 2019 04:20PM
Welcome to Mindat Danny !

Most likely you have some slag glass, but post a photo in the ID Help section, and we'll all look at it.
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Paul Brandes March 31, 2019 08:03PM
Danny Bean Wrote:
-------------------------------------------------------
> Never seen glass that thick before and
> it is green with bubbles in it.

More than likely, you have slag.
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Alfredo Petrov March 31, 2019 08:12PM
Or a green wine bottle that melted in a campfire ;))
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Uwe Kolitsch April 05, 2019 08:18AM
Thanks, added to moldavite page.
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