Pyrite is an opaque yellow mineral with a metallic luster. Its cubic crystal system is evident in its outward appearance and specimens are often cube-shaped.

Gemological Information for Pyrite
Color Metallic Yellow to Gold or Bronze
Crystal Structure Cubic
Refractive Index Over the Limits (>1.81)
Durability Good
Hardness 6.0 to 6.5
Similar stones Gold (color only)
Treatments None
Country of origin United States, Brazil, Peru
Pyrite care
Ultrasonic cleaning Safe
Steam cleaning Safe
Warm soapy water Safe
Chemical Attack Nitric Acid will dissolve Pyrite, can tarnish over time
Light sensitivity None
Heat sensitivity Fuses under Torch