Black Tourmaline A Yellow This piece is polished into

This piece is polished into a tower and dyed Blue

7 H inches

is found in Madagascar and South Africa

6 inches in height and length

Amethyst has been prized for thousands of years as a gemstone

Black Tourmaline A Yellow This piece is polished intoBlack 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.