Black Tourmaline A Yellow 6 inches in height and

6 inches in height and length

The iron oxidizes into reddish bands while the reduced iron creates green or whitish banding

Kambaba Jasper is comprised of microcrystalline Quartz interlaced with Stromatolites

Malachite can occur in various forms including radiating crystals

Black Tourmaline A Yellow 6 inches in height andBlack 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.