1.8" Black Tourmaline (Schorl), Aquamarine & Feldspar - Namibia

This is a lustrous schorl crystal with feldspar and aquamarine from the Erongo Mountains in Namibia. Although it has broken away from the host rock or matrix, the crystal is in overall great shape, and has crisp, natural terminations. Two tiny aquamarine crystals are present.

Tourmaline is a crystalline boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Schorl, or black tourmaline, is the most common form of tourmaline, and has been used for everything from jewelry to piezoelectric guitar pickups.

Feldspars are a group of rock-forming tectosilicate minerals. They are the most common minerals on Earth, making up nearly 60% of the crust.

Beryl is a mineral composed of beryllium aluminum cyclosilicate, with the chemical formula Be3Al2(SiO3)6. Naturally occurring beryl tends to form hexagonal crystals that can reach several meters in size if given the right conditions. Completely pure beryl will be transparent and colorless, while mineral impurities frequently tint the crystals color in most specimens.

Well known varieties of beryl include aquamarine and emerald, although beryl can also be green, blue, yellow, white and red, depending on the incorporated impurities during formation. Red beryl is its rarest form, and can currently only be found in New Mexico and Utah.
Tourmaline var. Schorl, Aquamarine & Feldspar
Erongo Mountains, Namibia
1.8" wide