This Specimen has been sold.
5.4" Polished Mahogany Obsidian Section - Mexico
This is a 5.4" wide section of mahogany obsidian that was collected from Mexico. It has been polished to a glossy finish on one face and cut flat on one edge.
Mahogany obsidian is a natural glass formed during volcanic eruptions when lava cools very quickly. Because the speed at which the lava cools no crystal structures can form. The red streaks in the normally jet-black obsidian are due to the inclusion of hematite or other iron-based minerals. This stone can be found worldwide, though the main source is Mexico.