Anatase - Brazil Each "petal" of the flower

Each "petal" of the flower is actually a rhombohedral crystal

Vera Cruz Amethyst is a unique variety of amethyst that is mined in Vera Cruz

Because these specimens are almost pure silica

Like other green stones

Anatase - Brazil Each "petal" of the flowerAnatase is a form of titanium dioxide. Pure anatase is clear or white but is more often found similar to this specimen, dark in color due to impurities found in the crystals. This mineral is always found in sharp, tetragonal systems. The crystal's structure is known as octahedral, but anatase crystals have a longer vertical axis. Anatase is formed synthetically to be used as a semiconductor. Chemical Formula: TiO2 Location: Cuiaba District, Minas