Pyrite is a naturally occurring iron disulfide mineral. It's also known as iron pyrite or fool's gold. The name comes from the Greek word pyr, which means "fire". Pyrite emits sparks when struck by metal.
Pyrite has a metallic luster and a brassy-yellow color. It's the most common sulfide mineral. It forms at high and low temperatures in igneous, metamorphic, and sedimentary rocks worldwide.
Pyrite is opaque, brittle, and heat sensitive. It can range from one large cube to hundreds of small crystals in one stone.
Pyrite is safe to have in a collection or as jewelry. Some say it has healing properties, including:
Attracting wealth and abundance
Strengthening the solar plexus chakra
Protecting the aura
Meditating on manifestations
However, when pyrite is burned as an impurity in coal, it forms sulfuric acid that can promote acid rain.