Mineral Name Chemical Composition Color of Fresh Surface Color of Tarnish (if present) Streak LusterDiaphaneityHabit Hardness Cleavage or Fracture Special Properties Diagnostic Properties

GoldAuYellowYellowMetallicOpaqueArborescent, Granular, Platy2.5-3Hackly, Jagged

SilverAgSilver white, Gray white, GraySilver WhiteMetallicOpaqueArborescent, Dendritic, Massive2.5-3Hackly, Jagged

CopperCuBrown, Copper red, Light pink, Red.RoseMetallicOpaqueArborescent, Nodular 2.5-3Hackly, Jagged

GraphiteCIron black, Dark gray, Black, Steel grayblackSub MetallicOpaqueEarthy, Foliated, Tabular