Ruby
Ruby
Ruby

Ruby

€26,00
SKU: A882
Morogoro Region, Tanzania
A strong red ruby crystal with good luster and some matrix attached.
1.7 x 1.2 x 0.9 cm
2.9 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.