Tsilaisite
From Wikipedia, the free encyclopedia
Tsilaisite is a manganese rich variety of elbaite tourmaline.[2] It is also known as Tsilaizite.[3] Tsilaisite is related Fluor-tsilaisite.[4] The gem is named after the location it was first found.[5]
| Tsilaisite | |
|---|---|
| General | |
| Category | Tourmaline |
| Formula | NaMn2+3Al6Si6O18(BO3)3(OH)3OH |
| IMA symbol | Tsl[1] |
| Crystal system | Trigonal |
| Identification | |
| Mohs scale hardness | 7 to 7.5 |
| Luster | Vitreous |
| Streak | White |
History
It was first reported in the Tsilaisina (also called Tsilaizina) Mine in Vakinankaratra, Madagascar.[3]
The gem was originally described as tsilaisite. But then it was discredited in 2006. In 2011 it was reapproved as tsilaisite.[5]
