Editing Internet Texts/Gemstones/Brazilianite
Brazilianite
[edit | edit source]The mineral was first discovered by Alfredo Severino de Silva when he was plowing his field in Minas Gerais (Brazil).[1]
Brazilianite can be colorless or in different shades of brown, but the most common varieties are of lemon yellow or yellow-green colors. High level of transparency and beautiful, glassy lustre make the stone a valuable one.[1]
Basic properties
[edit | edit source]| Composition | NaAl3[OH2|PO4] |
| Class | Phosphates |
| Crystal system | Monoclinic |
| Mohs' hardness | 5,5 |
| Fracture | Conchoidal |
| Cleavage | Perfect |
| Lustre | Glassy |
| Streak | White |
| Localities | Brazil, USA, Rwanda |
References
[edit | edit source]- ↑ 1.0 1.1 Minerały i kamienie szlachetne by RBA Collecionables, S.A., ISBN 978-83-7813-150-2, 2012.