Elbaite

Elbaite is a member of the tourmaline family, with a chemical composition of Na(Li,Al)3Al6(BO3)3Si6O18(OH)4. The tourmaline family encompasses eleven minerals all with a ring arrangement of silicon, boron, and oxygen. This blue indicolite elbaite is from Minas Gerais, Brazil, the main source of fine tourmaline crystals.

Group: Silicates
Image Number: 97-35183
Catalog Number: 116485
Hubert G. Seaman Bequest
Locality: Minas Gerais , Brazil