Calcite (Twinned) on Quartz
Cabinet, 12.6 x 9.8 x 6.2 cm
Naica Mine, Saucillo Municipality, Chihuahua, Mexico
Ex. Richard Heck

Aesthetically emplaced on a matrix of massive calcite along with colorless, translucent quartz crystals, to 2 cm in length, are three fat, twinned, frosted and translucent calcite rhombs, to 7.5 cm in length. They are secondary overgrowths on existing smaller calcite rhombs. The overgrowths fluoresce a vivid orange color due to slight manganese content. A wonderful and captivating calcite from Naica, of classic habit but in a very large and fine specimen. Complete all around, though sawed on bottom to stand up straight.

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