Brazil, private collection from Sweden.
Tourmaline is a crytalline boron silicate mineral compounded with elements such as aluminium, iron, potassium, magnesium, sodium, lithium etc. This gemstone can be found in a wide variety of clours. Most common colour is black. Black tourmaline are also called schorl. Fine, black and lustrous mineral that grows in prismatic columns. The condition of the sample is good. Age-related wear, fractures and minor cracks may appear. Dirt and dust may exist. Size approx. 6,1cm x 4,5cm x 2,4cm. Weight c. 128g.