1.9" Aquamarine Crystal with Black Tourmaline & Siderite - Namibia

This is a wonderful specimen that contains pristine aquamarine crystals, black tourmaline and brown formations of goethite after siderite, collected from the Erongo Mountains in Namibia.

The largest aquamarine crystal is 1.5" long by .33" wide.

Beryl is a mineral that's 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 known to be the most rare form of beryl found and is currently only known to be found in New Mexico and Utah.

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.
Beryl var. Aquamarine, Black Tourmaline (Schorl) & Goethite after Siderite
Erongo Mountains, Karibib, Erongo Region, Namibia
1.9" tall