Tsilaisite
| Tsilaisite | ||
|---|---|---|
| General | ||
| Category | Mohs scale hardness 7 to 7.5 | |
| Luster | Vitreous | |
| Streak | White | |
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]
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]
Characteristics
Color
In plane polarized light, the gem is pleochroic.[6] Tsilaisite can be deep pink, red,[2] orangish-yellow, brownish-gold,[3] or greenish-yellow.[5]
Chemistry
Manganese makes up to 3% of the gem's chemistry.[3]
References
- S2CID 235729616.
- ^ ISBN 978-3-662-04288-5.
- ^ a b c d "Tsilaisite". National Gem Lab. 2017-03-27. Retrieved 2021-09-27.
- S2CID 129149776.
- ^ a b c "Tsilaisite". www.mindat.org. Retrieved 2021-09-27.
- ISBN 978-1-4901-0698-4.
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