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Hajar | profile | all galleries >> Mineral Galleries >> Crystal Twins >> Twins of Trigonal Minerals >> Quartz >> Quartz Crystals with C face tree view | thumbnails | slideshow

Quartz Crystals with C face

This 55 mm quartz crystal from Diamantina, Brazil shows a terminal flat face (pinacoid), about 2 mm across, perpendicular to the prism faces. Seen close-up this face is a carpet of tiny dissolution pits. The rhombohedral faces show tiny downward-pointing triangular dissolution pits. The prisms show upward-pointing triangular markings.

Two other specimens displaying dissolution c faces are shown, one from Arizona and the other from Bolivia.
Diamantina quartz 1 Diamantina quartz 3 Diamantina quartz 4 Diamantina quartz 5
Diamantina quartz 6 Diamantina quartz 7 Diamantina quartz 8 Diamantina quartz 9
Diamantina quartz 10 Diamantina quartz 11 Diamantina detail 2 Diamantina detail 3
Diamantina detail 4 Diamantina detail 5 Diamantina detail 7 Diamantina detail 10
Diamantina detail 13 Diamantina detail 11 Amethyst Four Peaks Arizona.jpg Ametrine backlit.jpg

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Frank Foster 27-Feb-2014 11:32
I just love your minerals and fossil specimens. Great photos. I have collected some very neat quartz crystal crystals with the features shown in # 14 and 15 photos I have collected here in Georgia west of Atlanta. Some of the crystals will be deformed but the surface features will reflect light on the same plane. Very Fascinating. Thank you for sharing !
Guest 26-Jun-2011 12:46
Amazing collection! Very interesting!
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