Black Tourmaline Rough
Minimum Order: 1kg
Height: 2 - 15cm
Width: 1 - 13cm
Weight: 0.6 - 2.38kg
Locality: Minas Gerais
About Black Tourmaline
- Hardness Scale: 7 to 7.5
- Mineral Species: Silicates
- Chemical Formula: NaFe3(Al,Fe)6Si6O18(BO3)3(OH)4, Sodium Iron Aluminum Boro Silicate
*The pieces in the photos are samples and as crystals are made by nature some variations may occur.
*Some pieces may contain matrix.
