Natural Chalcosiderite Cutting Rough
Chalcosiderite is often confused with turquoise or variscite, but
it is a fine gem material in its own right. Chalcosiderite is in the turquoise
mineral family, but contains iron. This chalcosiderite is natural and untreated
in any way. Chalcosiderite cuts easily and takes a good polish with diamond
or tin oxide, followed by green rouge (Zam is a brand name for green rouge).
Mohs hardness 4.