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Is it a pseudomorph, coating or something else? Galenitt & Chalcopyrite

Posted by Kirill Vlasov  
Kirill Vlasov July 04, 2012 05:58PM
Hi! I have a specimen of rose quarz covered with calcite+ chalcopyrite, pirite and galenite from Madagascar. After a close look I noticed a strange cubic chalcopyrite crystall. As far as I know, that form is not typical for that mineral, so I took some photos (1, 3) with my microscope and found out that there are galenite & chalcopyrite. Unfortunately the cube is very hard to reach and i was not able to take better photos. Photo number three is a piece from the same specimen which seems similar. So, what is it?
Thank you.
open | download - 2.JPG (37.9 KB)
open | download - 1.JPG (57.8 KB)
open | download - 3.JPG (44.1 KB)
Sergey Sayamov July 05, 2012 06:20AM
I doubt about the white balance on your photo, but even in this case these crystals looks like pyrite to me... not a galena or chalcopyrite...
Maybe better photos might help.. Also do you have more detailed information on locality?
Kirill Vlasov July 05, 2012 07:34AM
Ok, I will try to take better photos, but I am shure that it is not a usual pirite cube. There is a couple of pirits on that specimen, and they have less intensive gold colour and "stripes".
Kirill Vlasov July 05, 2012 08:19AM
Here is a couple of better photos.
open | download - 6.JPG (105.3 KB)
open | download - 5.JPG (56.6 KB)
open | download - 7.JPG (56.8 KB)
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