Black Tourmaline B Dragon Egg Stone both species look alike so

both species look alike so the generic name  "Apophyllite" is used

the name originating from the similarity of the texture of the rock to that of the skin of a snake

Average Weight: 5 ounces

These pieces are polished into a skull shape

Ancient Greeks believed that amethyst prevented the intoxicating effects of alcohol

Black Tourmaline B Dragon Egg Stone both species look alike soBlack 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 1 inch in height, 1. 4 inches in length, and 1 inch in width. Weighing 1. 8 ounces.