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Realgar (an arsenic sulfide mineral, also known as "ruby sulphur" or "ruby of arsenic"):  ruby-red crystals in translucent Calcite scalenohedrons

Gorgeous gemmy ruby red Realgar clapsed by translucent Calcite scalenohedrons, from Jiepaiyu Mine, China. Ruby is one of the four precious stones. The other three being Diamond, Sapphire, and Emerald.

Gorgeous gemmy ruby red Realgar clapsed by translucent Calcite scalenohedrons, from Jiepaiyu Mine, China

Gorgeous gemmy ruby red Realgar clapsed by translucent Calcite scalenohedrons, from Jiepaiyu Mine, China. Ruby is one of the four precious stones. The other three being Diamond, Sapphire, and Emerald.

Gorgeous gemmy ruby red Realgar clapsed by translucent Calcite scalenohedrons, from Jiepaiyu Mine, China

Gorgeous gemmy ruby red Realgar clapsed by translucent Calcite scalenohedrons, from Jiepaiyu Mine, China. Ruby is one of the four precious stones. The other three being Diamond, Sapphire, and Emerald.