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GeneralAnother quartz question

21st Apr 2016 15:35 UTCBecky Coulson 🌟 Expert

Are these green quartz specimens (from China) natural? If so, what is included?

21st Apr 2016 15:54 UTCJamison K. Brizendine 🌟 Expert

Becky,

These specimen are natural and most likely come from one of the mines in the Inner Mongolia Autonomous Region in China (http://www.mindat.org/gallery.php?loc=16155&min=3337). I believe the green coloring is caused by inclusions of Hedenbergite.

21st Apr 2016 16:09 UTCDaniel Bennett

im not convinced. none of those 110 pictures in the above link match the color of this crystal. this one (and a thousand others on ebay) is a little too green. at a time when china is heavy in to quartz dying and regrowth its a little hard to believe.

is it just me or is the Hedenbergite included quartz more of a greyish green like it appears in the pictures?

21st Apr 2016 16:26 UTCRob Woodside 🌟 Manager

The photo is a little bluer than I would expect, but nothing suggests that this didn't come out of the ground and looks like this after a good washing.

21st Apr 2016 16:37 UTCAlfredo Petrov Manager

I agree with Rob. Pretty typical for included quartz crystals from skarns.

21st Apr 2016 16:53 UTCBecky Coulson 🌟 Expert

Thanks everyone - I found them interesting, but wondered. The bluish tint may be the photography.

21st Apr 2016 16:53 UTCKeith Wood

Probably is natural, just taken in poor lighting that misrepresents the color a bit.

Unless it's not!

21st Apr 2016 16:58 UTCUwe Kolitsch Manager

Can you see any inclusions at higher magnification? If yes, are they fibrous?

21st Apr 2016 17:00 UTCDaniel Bennett

I hate to argue about something I am not sure of but in my opinion Beckys picture matchs the color of many mysterious crystals from ebay without an actual mine location given. only inner Mongolia. it seems like all the ones with actual mine names are all more of a greyish green.

does anyone have a picture that shows this extra green color from a known mine from China?

p.s. could fibrous material be part of a regrowth process?

21st Apr 2016 17:01 UTCBecky Coulson 🌟 Expert

Uwe, I don't own it! I have been considering purchasing a specimen for a while, but had questions about them.

21st Apr 2016 17:54 UTCAlfredo Petrov Manager

It's useless to try judging color tones of minerals on your computer monitor.

21st Apr 2016 18:36 UTCBecky Coulson 🌟 Expert

Daniel, these are from Huanggang Mine, and I suspect the off-color is the camera incorporating too much blue...and thank you for being cautious!

21st Apr 2016 20:06 UTCPaul Brandes 🌟 Manager

I agree that these are natural as I have recently seen them at the shows, but the colour is way off either because of the camera, computer monitor, or both.

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