Rocks & Minerals

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

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

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

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

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

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

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

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

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

Silver in a natural form is rare, it is ...