Ruby
Ruby
Ruby

Ruby

€38,00
SKU: A887
Winza, Mpapwa District, Dodoma Region, Tanzania
A matrix specimen interspersed with small rubies with a larger marginal ruby crystal with good faces, partly with inclusions.
4.6 x 4.3 x 2.2 cm
56.2 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.