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Gem quality sphalerite is a rare collector stone. The mineral is usually nearly black in color but is occaisionally found in transparent pieces of an orange or yellowish brown hue. Clean pieces are extremely rare. More @ www.multicolour.com and #gemstones

Gem quality sphalerite is a rare collector stone. The mineral is usually nearly black in color but is occasionally found in transparent pieces of an orange or yellowish brown hue. Clean pieces are extremely rare.

jeremejevite is an ultra-rare gem species, found in few localities worldwide - this one in namibia

jeremejevite is an ultra-rare gem species, found in few localities worldwide - this one in namibia <<<< Looks like a crystal from the first ever Superman movie