Diaphorite

General Information: Chemical Formula:Pb2Ag3Sb3S8 Composition:(Molecular Weight = 1,359.78 gm)Silver 23.80 % AgAntimony 26.86 % SbLead 30.48 % PbSulfur 18.87 % S  Empirical Formula: Pb2Ag3Sb3S8 Name Origin:From the Greek diaphora, "difference."Physical Properties: Cleavage:None Color:gray or steel gray. Density:6 - 6.2, Average = 6.1 Diaphaniety:Opaque Habits:Euhedral Crystals - Occurs as well-formed crystals showing good external form., Granular - Generally occurs as anhedral to subhedral crystals in matrix., Striated - Parallel lines on crystal surface or cleavage face. Hardness:2.5 - Finger Nail Luminescence:Non-fluorescent. Luster:Metallic Streak:steel grayMore details...