Dumortierite
UNB-2017-0023Minerals » Silicates » Nesosilicates
Description
Sample is vibrant blue Dumortierite with a slight vitreous lustre and occurs as a coarse crystalline form.
Dumortierite (Al7O3(BO3)(SiO4)3) can be blue, violet, pink (rare) or brown in colour. Lustre is either vitreous or dull and streak is white. Hardness is 7 and cleavage is good in one direction and poor in the second direction. Dumortierite is usually found a compact fibrous and columnar masses.
Specifications
| Object name | Dumortierite |
|---|---|
| ID | UNB-2017-0023 |
| Legal status | Permanent collection |
| Category | Mineral |
| Classification | Mineral group: Silicates Sub-group: Nesosilicates |
| Composition |
|
| Origin | Karibib, Namibia |
| Pieces | 1 |
| Partial | No |
| Measurements |
|
Map of Origin
Publications
- Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.