Although I sort of hobbled around the displays at the recent Denver Show (see posting September 21, 2015), I was able to visit a few dealers and make several small purchases. I am always looking for some special minerals, especially those with nice crystal form and color. Therefore, I was excited to see some specimens collected from Bou Azer, Ouarzazate Province, Morocco. A recent post (July 13, 2015) described several cobalt minerals that are a bright pink in color. The minerals I purchased ($5 or less per specimen) include: roselite [Ca2(Co,Mg)(AsO4)2-2H2O], cobaltoan calcite [(Ca,Co)CO] and erythrite [Co3(AsO4)2-8H2O]. Although I had these minerals in my collection, the newly purchased ones are larger and “nicer.” All are idiochromatic minerals whereby cobalt, with its distinctive coloration, is included within the crystal lattices.
|Colbaltoan calcite crystals width ~4 cm. Camera would not pick up the vibrant pink color.|
|Photomicrograph of pink crystals from above specimens. Width ~7 mm.|
|Nice crystals of fibrous erythrite from specimen below. Width of crystals 1 cm.|
|Fibrous erythrite scattered across specimen. Width ~7cm.|
|Streak of roselite crystals. Width ~4.5 cm.|
|Photomicrograph roselite crystals from specimen above. Width ~ 1 cm.|
It ain't over till its over. So long Yogi, I guess your earthly stay is over. You were my hero. RIP 1925-1915.
|1953 "baseball card." public domain.|