Ruby
Ruby

Ruby

€28,00
SKU: A589
Morogoro Region, Tanzania
A small dark red critall with several areas. Strong red-orange in UV light.
1.5 x 1.0 x 0.7 cm
2.2 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.