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Identity HelpQuartz Druzy Grown on Some Substrate?

11th Jan 2019 04:49 UTCAli Unwala

So I was browsing online and say this little guy. Thought he was cool until I saw the reverse picture. That looks like nothing I have ever seen. Any guesses what is going on with this specimen? Real/Fake-grown? and if Real what substrate is the quartz growing on?

Thanks as usual. You guys rock :P

11th Jan 2019 04:56 UTCAli Unwala

And fwiw I saw this seller had another one (same seller different druzy quartz specimen) that looks like it might have lines from a oven:

Lines are similar to the ones from known "fake"green quartz:

https://www.mindat.org/mesg-55-372663.html

11th Jan 2019 07:16 UTCDale Foster Manager

I wouldn't go thinking fake just yet, you can get some odd looking epimorph structures with quartz where another mineral has been removed by natural processes.

Here is one I found last year:

Quartz that had grown around Fluorite crystals, the Fluorite having latterly been largely removed, although some relict material was left to confirm the identification.

I wouldn't like to comment as to what mineral the Quartz had grown over in the specimens you have put up the pictures of, but it looks authentic to my eye.

11th Jan 2019 13:09 UTCChris Rayburn

Agree with Dale. It's also unlikely someone would go to the trouble of faking something as common as drusy quartz.

11th Jan 2019 16:39 UTCA. M.

See message: https://www.mindat.org/forum.php?read,55,372663,451037#msg-451037

11th Jan 2019 16:58 UTCRichard Gibson 🌟

Here's an example of quartz pseudomorph after anhydrite. Not saying that's what you have, but it is similar.

11th Jan 2019 17:23 UTCAli Unwala

Chris Rayburn Wrote:

-------------------------------------------------------

> Agree with Dale. It's also unlikely someone would

> go to the trouble of faking something as common as

> drusy quartz.

Looking at other fakes I believe druzy's are added more often because they are easier to grow and make some items sell. (That seems to be the case with the fake green quartz out of china since many of those specimens had a core low grade quartz cluster.)

11th Jan 2019 17:24 UTCAli Unwala

@Richard Gibson Wow that does look really similar.

11th Jan 2019 17:45 UTCWayne Corwin

Al

Those are not rack marks on yours, they are something like calcite casts.

Yours is real, not fake.

11th Jan 2019 22:24 UTCGary Weinstein

Al,

first photo, near thumb/palm shows a broken cross section of the green crystal. I believe it is tourmaline but it has been etched away. That explains the odd texture not seen before.

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