This glowing gem Sphalerite comes from Old Stock as it has been mined out for many years.Though this stone is rather soft with a hardness of only 3.5 to 4, it does yield incredibly attractive gemstones when faceted. This stone can be faceted, made into jewelry or used in any healing modality or just enjoyed for its beauty. Location: Spain. Dimensions: 1.58" X 0.98" X 0.55, weight: 23.1 grams. Sku: 19F215C.