Tourmaline DENKISEKI-MATSU, No. 12

Tourmaline can form very large and beautiful crystals. The very hard Tourmaline crystals (Mohs 7.5) occur in a multiplicity of colors, such as blue, green, red, pink, brown or black. The shades of our black Tourmaline range from a slightly blueish gray (No. 14) to a highly glossy black (No. 8).