Mahogany Obsidian
A variety of Obsidian
Uncommon
What is Mahogany Obsidian?
Mahogany Obsidian is one of the most common varieties of this naturally occurring volcanic glass, recognizable by the mixture of black and brown Obsidian. Thanks to its properties, it is easily polished and sold in the form of tumbled stones. It is also used for cabochons and various carved objects and tools, such as knife blades.
Optical Properties
- Refractive Index
- 1.450-1.550
- Pleochroism
- None
- Optical Character
- Isotropic
- Dispersion
- 0.01
Discover Values
Rarity
3.8out of 5.0
76%
Popularity
3.9out of 5.0
78%
Beauty
4.1out of 5.0
82%
Cultural Value
3.9out of 5.0
78%
Collection Value
4.1out of 5.0
82%
Mahogany Obsidian Market Value Calculator
Estimate the market value of Mahogany Obsidian using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Mahogany Obsidian Localities Map
See where Mahogany Obsidian is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Health & Safety Information
- ⚠️Physical Toxicity: Quartz, silica, crystalline silica and flint are non-toxic materials, but very fine dust containing quartz, known as respirable crystalline silicon (RCS), can cause serious and fatal lung disease. Lapidaries should exercise caution when cutting silica.
Quick Facts
Physical Properties
- Color
- Black, red, brown
- Hardness (Mohs)
- 5 - 5.5
- Density
- 2.35 - 2.6 g/cm³
- Streak
- Red-brown
- Luster
- Vitreous
Chemical Properties
- Chemical Formula
- SiO2
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