the.com/cuprite
the gemstone that hides its blood-red fire inside a dull metallic crust
chemistryCopper oxide, an ore mineral of pure copper
hidden colorCrystals look gray-black but glow deep crimson inside
rare cutFaceted gems are too soft to wear safely
high refractionSparkles brighter than diamond when cut
varietyHair-thin fibrous form is called chalcotrichite