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Amethyst from Sardinia / Mineral Friends <3

Watermelon Tourmaline cluster. W O W ! ! ! From Sapo Mine, Golabeira, Doce Valley, Minas Gerais, Brazil

Marcasite (a sulfide mineral sometimes called white iron pyrite) with Pyrite, Arsenopyrite, Calcite and Dolomite. Marcasite and Pyrite are polymorphs. They have the same mineral composition but different crystal structures. Pyrite has a cubic structure and is hard enough to be used in jewelry, while Marcasite has an unstable orthorhombic crystal structure and is liable to break apart.

"Crystals are living beings at the beginning of creation. All things have a frequency and a vibration." ~ Nikola Tesla Photo: Amethyst Scepter from Australia - specimen and Photo by Patrick Gunderson