Editing Internet Texts/Gemstones/Aventurine
Aventurine
editThe name of this mineral is said to be linked with an episode that happened in Murano at the beginning of the 18th century. An Italian glassmaker discovered aventurine glass accidentally by dropping thin copper plates on melted glass. It created a glittery effect similar to sparkling which is called aventurescence.[1]
Aventurine was one of the most valued gemstones among emperors in China and Russia. It was used to adorn everyday and decorative objects.[1]
Basic properties
edit| Composition | SiO2 |
| Class | Oxydes |
| Crystal system | Trigonal |
| Mohs' hardness | 7 |
| Fracture | Conchoidal |
| Cleavage | None |
| Lustre | Glassy |
| Streak | White |
| Localities | Brazil, India, Styria (Austria), Russia, Tanzania, USA, RSA |
References
edit- ↑ 1.0 1.1 Minerały i kamienie szlachetne by RBA Collecionables, S.A., ISBN 978-83-7813-150-2, 2012.