This elbaite tourmaline crystal is from Minas Gerais, Brazil. Elbaite is in the Tourmaline Group of minerals. It is a silicate and it contains the elements Al, B, H, Li, Na, O and Si. It can be found in a variety of colors which are caused by traces of other elements in the crystal lattice. This crystal is two tone with a medium green prism and a dark green almost black termination. It has a elongated c-axis with striated faces and a complex multi-tipped termination. This piece measures 1 5/8 x 7/8 x 1/2 inches or 41 x 22 x 12 mm.