These dravite tourmalines are from the Pomba Pit in Serra das Egus, Brumado, Bahia, Brazil. This mine is a commercial producer of magnesite and talc however dravite and other accessory minerals, including emeralds are found there. The mine owners enforce a ban on mineral collecting and that includes the miners that work there. Dravite is in the Tourmaline Group of minerals and it is a silicate that contains the elements Na, Mg, Al, Si, O, B and H. The matrix is predominantly magnesite crystals with dravite crystals scattered about the surface. The dravite crystals are amber to brown and translucent to transparent with a glass luster. This piece measures 4 5/8 x 1 1/2 x 1 7/8 inches or 120 x 38 x 47 mm.