Black tourmaline with excellent form and small hyalite Pseudo-stromatolite Broken or polished pieces can

Broken or polished pieces can have lovely colors similar to low-quality petrified wood or jasper

or spots under magnification (you can see it if you zoom in on close shots

The different types of chlorite inclusions are colored by other trace elements to produce muted tones of green

with banding apparent in the daylight fluorescence image

The "Yellow Zebra" morph of Armadillidium maculatum is black with yellow stripes

Black tourmaline with excellent form and small hyalite Pseudo-stromatolite Broken or polished pieces canLocale: Erongo Mountain, Namibia Approx dimensions: 2. 75 x 2. 5 x 2" Approx weight: 375g This large glossy black tourmaline, known as schorl, features the Mercedes termination characteristic of the Erongo region. Erongo schorl typically has very high luster as seen in this specimen. The sides of the piece have beautiful chunky vertical striations, and the faces of the point have faint angular zig zag patterns of the crystal growth form visible. There