Ruby
Ruby
Ruby

Ruby

€27,00
SKU: A578
Ijaka, Kongwa District, Dodoma Region, Tanzania
New find from the heart of Tanzania. Larger barrel-shaped crystal with very good end face in the dolomite/mica matrix.
5.8 x 4.4 x 2.8 cm
61.7 g

Rubies are red varieties of corundum (chemically aluminum oxide (Al2O3)). The red color is caused by small amounts of chromium ions. Rubies crystallize in the trigonal crystal system, have a Mohs hardness of 9 and glow intensely red under UV light.
Rubies are found worldwide, with some of the most important locations being in Myanmar, Thailand, Sri Lanka, Madagascar and Tanzania.