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Curved crystals
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John S. White
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PostPosted: Apr 10, 2007 04:54    Post subject: Curved crystals  

Great specimen and great photos! However, I do not believe that the ferberite had anything to do with the curve of the quartz. Note that there appears to be a smaller quartz crystal at the bottom of the group that is also curved. Also, in spite of the excellent photos, it is difficult to tell from them if the ferberite is actually included in the quartz or merely attached to its surface. Even if it is included, in my experience I have seen no evidence to suggest that included foreign crystals produce curvatures in the host quartz.

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JoséMiguel




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PostPosted: Apr 10, 2007 17:24    Post subject: Quartz curved crystal+ferberite2  

Hello John. Thankyou very much for your answer. I add two pics. I think it is possible to see that the ferberite is included into the quartz.
The smaller curved quartz is curved because it is contacted by the ferberite also. Both crystals curved are in contact with the ferberite.
Then main quartz crystal is right after to pass the ferberite.
The curve is just in the part included.
It seems to be a mechanical matter.
Was it so? maybe it is impossible to confirm it.
But the appearance is so.
Can have it an other reason for the curvature?
Kind regards
José Miguel



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PostPosted: Apr 11, 2007 05:03    Post subject: Curved crystals  

Dear José:

I have to confess that the two examples on one specimen argue very forcefully for a connection between the bending and the ferberite inclusions, but unfortunately I can offer no explanation. It might help if I could actually see the specimen, but I suspect not. At the very beginning I stated that I have no answers, this example only extends the mystery. Thank you for sharing this curious specimen with me and with those are are intrigued by such things.

John

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