Coloradoite is a rare mercury telluride named for the type localities which are in Colorado. It is found in hydrothermal, tellurium bearing precious metal veins. Crystals and platelets of grayish-black coloradoite, accented with brassy, microcrystalline pyrite richly cover the sculptural vein matrix of quartz. Very seldom will you see a coloradoite specimen in cabinet size quality and richness.
Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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