Malachite - a copper carbonate hydroxide mineral. This opaque green banded mineral crystallizes in the monoclinic crystal system and most often forms botryoidal, fibrous or stalagmitic masses in fractures and spaces deep underground.
TURRITELLA agate Wyoming cabochon of turritella agate, from Wyoming. This ancient fossilized material has bunches of of turritella shells, from which it takes its name. The many white shells make a nice backdrop for the one large shell showing cells fil
Fordite: an anthropocenic mineral "formed from the built up of layers of enamel paint slag on tracks and skids on which cars were hand spray-painted (a now automated process), which have been baked numerous times.