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crystal quartz with unusual form
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Author:  sangshenas [ Mon Jul 26, 2021 8:36 am ]
Post subject:  crystal quartz with unusual form

hi everyone.
this is crystal quartz (skeleton) and it seems looklike monoclinic system.
why it form like this?

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Author:  Barbra Voltaire, FGG [ Mon Jul 26, 2021 9:42 pm ]
Post subject:  Re: crystal quartz with unusual form

Quartz xls can take on a number of different habits:
https://www.mindat.org/g/822

Author:  glhays [ Mon Jul 26, 2021 10:17 pm ]
Post subject:  Re: crystal quartz with unusual form

These can be fun. Double terminations, irises, phantoms and that last one looks like it may have petroleum inclusions. Check it for fluorescence. Your samples from where do you know?

Author:  sangshenas [ Tue Jul 27, 2021 7:17 am ]
Post subject:  Re: crystal quartz with unusual form

glhays wrote:
These can be fun. Double terminations, irises, phantoms and that last one looks like it may have petroleum inclusions. Check it for fluorescence. Your samples from where do you know?


Thank you for your attention, this is from Iran / Nehbandan ‌ (near the Afghan border). I bought about 9 kg of skeletal quartz / each with interesting shapes for only $ 150. this one is very unique shape.

here is a nother special crystal. most of trigonic quartz are etch in surface. but this is under surface and large trigon:

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