FMF - Friends of Minerals Forum, discussion and message board

[Pierre Joubert]

Hi Josele. I thought I saw these type of quartz growth before, but could not remember where. I found this crystal lying in my crystal room. Please correct me if it is not caused by the same growth interference as yours.

[Elise]

I had a chance to examine John's enigmatic quartz specimen last week and am completely fascinated by it and by this topic thread. This is just a quick photo taken with a handheld camera and doesn't show much of its surface features. Is this a series of separate crystals or is it a single crystal changing growth directions with each “plate” or is it a single crystal whose growth is “normal” internally, merely with surface distortions imposed on it by the calcite? I'm leaning toward the last, but the terminations in these various examples really are a conundrum. I did not have much time to study the specimen and now it is haunting me!

The second image shows the same features of equilateral triangles as Pete Richards discussed here: https://www.mineral-forum.com/message-board/viewtopic.php?p=45348&highlight=#45348

This is a similar specimen on Mindat: https://www.mindat.org/photo-296046.html

(John's original posting of the specimen: https://www.mineral-forum.com/message-board/viewtopic.php?p=45365&highlight=#45365 )

[Elise]

This is another specimen from the same locality. Looking down the length, it appears as three or four hexagonal crystals, but internally it seems to be a single crystal. It also has a cluster of the thin blades near the base; I don't know if these are part of a single crystal or if they are separate crystals. Can anyone lend some insights into what the growth environment was like in order for these strange crystals to form (or what series of events resulted in this)? What is the geology of the Bor Mine area which led to this outcome?

[Xueyan Jin]

The faces of the some Quartz crystals exhibit interesting and attractive growth interference patterns, look like to be carved, with some deep groove on matrix. But All are Natural! NO SAWN. The quartz clusters formed over hematite that often subsequently dissolves, leaving these groove in the quartz.

[Pierre Joubert]

Hi Xueyan. How about a few more photos of this quartz?

[Xueyan Jin]

no problem^ ^