Jun 4, 2017
331 Cuprian Adamite crystals on Limonite matrix from Greece
weight 137g/685cts & dimensions 60x47x60mm
Adamite is a zinc arsenate hydroxide mineral. Pure Adamite is colourless, but usually it possess yellow colour due to Iron compounds admixture. Tints of green also occur and are connected with copper substitutions in the mineral structure.
Olivenite is a copper arsenate that is isostructural with Adamite and there is considerable substitution between Zinc and Copper resulting in an intermediate called Cupro-adamite. Also see Olivenite Group.