Pyrite RingThis ring features a natural pyrite stone set in sterling silver. Pyrite, commonly known as fools gold, is an iron sulfide mineral recognized for its metallic luster and brassy gold color. Details: Mineral: Pyrite (FeS) Setting: Sterling silver Appearance: Metallic gold colored surface with natural crystalline texture Formation: Forms in sedimentary, metamorphic, and igneous rocks, often alongside quartz Physical Properties: Mohs hardness 66. 5;