Dumortierite is a fascinating mineral, mostly valued as a gemstone when used in jewelry.
Color
Dumortierite is most commonly blue (steel-blue, indigo, or violet-blue).
Can also be green, brown, or reddish-brown, but blue is highly prized.
Key Characteristics of Dumortierite
Color: Deep blue, violet-blue, dark indigo, or sometimes reddish-brown Hardness: 7 – 8.5 on the Mohs scale Found in: Madagascar, Brazil, USA, Canada, Russia, Sri Lanka, Namibia
