Black tourmaline with excellent form and small hyalite Pseudo-stromatolite UV reactivity: Wulfenite from some

UV reactivity: Wulfenite from some regions can fluoresce

Oyster shell flour (1

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

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

even using a strong 365nm UV light

Black tourmaline with excellent form and small hyalite Pseudo-stromatolite UV reactivity: Wulfenite from someLocale: 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