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Description

Large black tourmaline with hyaliteLocale: Erongo Mountain, Namibia Approx dimensions: 3. 25 x 2. 5 x 2. 25" Approx weight: 645g This large glossy black tourmaline, known as schorl, has the Mercedes termination characteristic of the Erongo region with intricate growth patterns across the faces of the tip. The sides are beautifully striated, with fine vertical lines and a chunkier accordion zig zag to the sides of the crystal. Erongo schorl typically has very high luster as seen in this

so I presume they are created using 3D carving

The material is composed of siderite and other ferrous (iron-rich) minerals that limonized

There is yellow fluorite on all specimens (it's hiding on the back of option N

or near a window indoors

Fine brownish siderite has been deposited on one face of the crystals

‘Pseudomorph’ means the mineral initially grew as aragonite

This flat "ear" of a specimen has a small opening and shallow cavity

This specimen has a nice cluster of three cleaved points near the center

A small patch of lower-quality chalcedony in one corner has a vivid geen reaction

Approx weight: 130g avg (90–220g)

Some surface layers are quite soft

245g G 4