Geology (73/229)

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Quartz, Pecos Diamonds. Pecos River, SE New Mexico, USA. "Pecos diamonds" are double-terminated quartz crystals which were formed inside gypsum outcrops of the Seven Rivers Formation. The crystals vary in color from white to yellow to red to brown to nearly black.
Quartz, Pecos Diamonds. Pecos River, SE New Mexico, USA. "Pecos diamonds" are double-terminated quartz crystals which were formed inside gypsum outcrops of the Seven Rivers Formation. The crystals vary in color from white to yellow to red to brown to nearly black.
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