Pink rhodochrosite (MnCO3) surrounded by milky quartz (SiO2). From American Tunnel Mine aka Sunnyside, Howardsville, Silverton, Colorado. Size: 2.5 cm x 1 cm x 1 cm
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Fluorescent vermillion Corundum var ruby (Al2O3) in schist matrix under long frequency UV light. From Mysore corundum deposits, Karnataka, India
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