Gold is one of the heaviest minerals and is often found in quartz, igneous rocks, and sedimentary deposits. It is considered a precious metal and does not corrode. Chalcopyrite is a copper and iron sulfide mineral that is often found with pyrite, chalcocite, or gold. This specimen was found in Colorado and was donated by Berdeana Jones.
Gold Formula: Au Quartz Formula: SiO2 Chalcopyrite Formula: CuFeS2