| Rock Class | igneous rock |
|
Rock Subclass
|
Volcanic (volcanic glass) |
| Origin | Kamchatka, Russia |
| Size | 2.0-3.0cm |
The Mahogany Obsidian presents brown bands, which are due to the presence of iron oxides. It is also known as " Mahogany Obsidian".
Obsidian, or volcanic glass, is molten lava that has cooled rapidly. Its composition is mainly of silicic oxides, being very similar to that of granite or rhyolite.
The rock includes a label with the name and origin and is attached to a 4 cm square cardboard box.
*The price is per unit (a single cardboard box of the four shown in the image)
Since the rocks are natural, you will receive a piece similar to the one in the photograph. The samples come in cardboard boxes and are glued to a porex base with hot silicone; these can be removed using ethyl alcohol without damaging the mineral. The size is approximate.