Hematite is an iron oxide and one of the few gemstones with a metallic luster. When tumbled it can have the look of polished steel. Hematite is black to steel-gray...
Hematite is an iron oxide and one of the few gemstones with a metallic luster. When tumbled it can have the look of polished steel. Hematite is black to steel-gray...
Pyrite, an iron sulfide, is characterized by its metallic luster and brass to yellow hue that have earned it the nickname “fool’s gold.” Pyrite is actually lighter in color than...