Quartz geode, Las Choyas, Mexico, 293 grams
Half-geode with a blue chalcedony shell and an internal crystallization of smoky quartz accompanied by a partial calcite crystal.This specimen comes from Las Choyas, located in the Aldama region of Chihuahua, Mexico.Its dimensions are 8.5 x 7.1 x 4.1 cm.This specimen weighs 293 grams.Additional...
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