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Pumice is a volcanic rock, but it had a ...

Pyrite is easily recognized by its gold color. ...

Pyrrhotite is the second most common magnetic mineral in ...

Quartz crystals was one of the earliest known minerals, ...

Realgar is the principle ore for arsenic, and so ...

Perlite is natural glass that forms from volcanoes. ...

A bright pink stone, rhodonchrosite is sometimes confused with ...

Crystalline versions of Gypsum are collectively known as Selenite. ...

Serpentine is a group of 16 or more minerals ...

Smithsonite has been called calamine, along with hemimorphite. ...