This specimen of
quartz
hosts massive and crystalline cuprite. The cuprite is octahedral but has a
rounded appearance due to so many crystals growing in the same place. It is
really a bunch of interpenetration twins comprising one crystal. Most of the
quartz is
light frosted with micro
calcite
crystals.
This specimen of
chalcocite has a thick layer of sharp cuprite crystals that are octahedral
with dodecahedral modifications. There are also a number of lustrous
calcite
crystals coloured green by inclusions of
malachite.
Origin: Tsumeb Mine, Tsumeb, Namibia, Africa
Sample size: 10.5 x 8.5 x 5.6 cm (top/2nd row), 11 x 8 x 7.7 (3rd/bottom row)
Origin: 14 Stope, Southwest Mine, Bisbee, Cochise County, Arizona, U.S.A.
Sample size: 2.5 x 3.3 x 1.6 cm
Specimen with several vugs and pockets lined with crystalline
copper
covered with bright purple red chalcotrichite.
Origin: Ajo, Arizona, United States of America
Ex. Mark Wrigley collection
Sample size: 9.3 x 6.7 x 5.7 cm
Photo courtesy of:
