Black Tourmaline A cut base North Carolina is one of

North Carolina is one of the world's premier destinations for finding whole

Septarian are carbonate rich concretions containing angular cavities and cracks filled with hardened material

frequently in combination with zeolites like apophyllite or as pseudomorphs after laumontite

They average 0

3 inches in height and length

Black Tourmaline A cut base North Carolina is one ofBlack Tourmaline, scientifically known as Schorl, can originate from the crystallization of molten rock deep within Earth's crust. It has a hardness of 7 7. 5 on Mohs scale with a trigonal crystal structure. The black color is often due to the presence of iron impurities within the crystal structure. This particular specimen is from Namibia, South Africa. Measuring . 6 inches in height, 1. 2 inches in length, and 1 inch in width. Weighing 1. 2 ounces.