Minerals
TopGeneral Information
Lapis Lazuli is no mineraal, but a type of rock. It consists of many different types of minerals, like: lazurite (25-40%), silicates, calcite, sodalite, pyrite and some others.[1]
TopChemical & Physical Information
| Trivial Name | Lapis Lazuli |
| Chemical Name | - |
| Chemical Formula | - |
| Density | 2,7-2,9 g·cm-3 |
| Molar mass | - |
| Hardness | 5-5,5 |
| Crytal system | None |
| Unit cell | - |
| Crystal habit | - |
| Fracture | Uneven, conchoidal |
| Cleavage | None |
| Colour | Bleu, purple |
| Luster | Dull |
| Streak | Light Bleu |
| Opacity | Opaque |
| Safety | Safe |
| Extra | Used as the blue pigment ultramarine. |
Photos
(3 cm)
(1 cm)
Sources
[1] Wikipedia
[2] Specimen from my personal collection, photo taken by me.
