.68" Aquamarine, Schorl & Feldspar - Erongo Mountains

 
Here we have a gorgeous matrix of aquamarine, schorl, and feldspar from the Erongo Mountains in Namibia. Four, very nicely terminated aquamarine crystals decorated by sprays of schorl, sit on a beautifully terminated feldspar crystal that has broken away from the original host rock.

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.
Feldspars are a group of rock-forming tectosilicate minerals. It is also one of the most common minerals on earth, making up nearly 60% of the crust.
DETAILS
SPECIES
Beryl, Schorl, Feldspar
LOCATION
Erongo Mountains, Namibia
SIZE
Longest aquamarine is .68x.17" on 2.11x1.31" matrix
CATEGORY
SUB CATEGORY
ITEM
#31886