Hematite is the mineral form of Iron Oxide, composed of two elements key in our lives, iron and oxygen. It is commonly recognized in its...

Optical Calcite is a transparent form of Calcite which is, chemically speaking, Calcium Carbonate. Commonly called Iceland Spar thanks to...

Moldavite is a rare olive-green silica based tektite that likely formed during a meteorite impact, though science apparently does not...

Selenite (calcium sulfate dihydrate) is a crystal form of gypsum, occurring as either transparent and colourless (or very subtly...

Pyrite (Iron Sulfide) is an exquisite example of iron crystallization that is very common in the Earth's crust, found in almost every...

An expert will likely understand Garnet as the name for a group of more than 10 different gems with a similar chemical structure. They...

Malachite is an easily recognizable stone, its dramatic green colour is due to its high copper content. Often displaying a variety of...