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Please help with this black quartz

Posted by Jack Park  
Jack Park March 09, 2018 01:45AM
I purchased this over a year ago. The seller couldn't really tell me much information about this except that it should be from somewhere in Africa (yeah, pretty vague). He simply called it a black crystal / quartz. It's pretty big, about 12 inches tall, and when I put it to the light, it's mostly very dark and black except for the base and parts of the back, which as the picture kinda shows, turns into a sort of deep brown color.

I'm assuming it's a smoky quartz, but it really is quite black in most areas and so I was wondering if anyone might be able to tell if this is something else? Also, given how black it is, is it likely to have been irradiated?

I've left the piece out in the sun quite a few times to see if it will react or lose color, but it hasn't at all.

Again any information or help on ID'ing this one is greatly appreciated!
(sorry for some reason the photos are showing up sideways in the post)

Ian Nicastro March 09, 2018 02:29AM
This is a cluster of quartz crystals. Although very dark smoky quartz does occur naturally, it's very possible that it's been gamma irradiated, but it won't have any lingering radiation to be worried about. It's possible that it's from Madagascar, as I've heard a lot of the larger quartz being sourced in China right now is from there, but without any attached matrix, or associated minerals, etc... it would be pretty hard to suggest a location. Smoky quartz is quite 'color' stable, leaving it in the sun isn't going to do much.
Alfredo Petrov March 09, 2018 02:40AM
Also possible that it's completely natural and from Mt Malosa, Malawi, but like Ian said, without associated minerals or matrix, it's hard to tell.
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