Obsidian
UNB-2020-0067Rocks » Igneous » Extrusive Igneous Rock
Description
Original Description: *Incomplete
Obsidian is usually black in colour but can be translucent to transparent along the edges. Obsidian can also be grey, reddish brown, mahogany or dark green. Hardness is 6 to 7. Obsidian usually has a glassy texture with a vitreous lustre.
Specifications
| Object name | Obsidian |
|---|---|
| ID | UNB-2020-0067 |
| Legal status | Permanent collection |
| Category | Rock |
| Classification | Rock group: Igneous Sub-group: Extrusive Igneous Rock |
| Composition | Felsic |
| Origin | Unknown |
| Pieces | 1 |
| Partial | No |
Publications
- Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.