Garnets are a group of silicate minerals, Garnet forms when a sedimentary rock with high aluminium content, such as shale, is metamorphosed. Garnet has a hardness of 6.5 to 7.5 on the Mohs scale.This piece of Malaya Garnet rough from Tanzania weighs 31.87 cts, measures 19x15x10 mm and has some small viels on the edges and also some very unique pyrite inclusions making this piece very unique.