Agate
UNB-2016-0162Rocks » Mineraloid
Description
Light purple-tan coloured geode (Agate). Two large egg-shaped "bulbs" that are attached to each other. Cut in half and polished surface.
Agate (Chalcedony) is a variety of Quartz (SiO2) that is bright green with red spots (Agate) or can be banded (Moss-Agate). Lustre can be waxy, vitreous or dull and streak is white. Hardness is 7 and crystals can be banded, compact, mammillary or crusts that are botryoidal.
Specifications
| Object name | Agate |
|---|---|
| ID | UNB-2016-0162 |
| Legal status | Permanent collection |
| Category | Rock |
| Classification | Rock group: Mineraloid |
| Composition | Silicates |
| Origin | Unknown |
| Pieces | 2 |
| Partial | Yes |
| Measurements |
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Publications
- Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.