Properties of Gneiss and Obsidian
Grain Size
Medium to Coarse Grained
Not Applicable
Fracture
Irregular
Conchoidal
Porosity
Very Less Porous
Very Less Porous
Cleavage
Poor
Non-Existent
Toughness
1.2
Not Available
Specific Gravity
2.5-2.7
2.6-2.7
Transparency
Translucent to Opaque
Translucent
Density
2.6-2.9 g/cm3
2.6 g/cm3
Specific Heat Capacity
Not Available
Resistance
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
Heat Resistant, Impact Resistant
Gneiss vs Obsidian Properties
Properties of Gneiss and Obsidian play an important role in determining the type of rock. Along with Gneiss vs Obsidian properties, get to know more about Gneiss Definition and Obsidian Definition. For the ease of understanding, the properties of rocks are divided into physical and thermal properties. Rocks have a variety of properties like hardness, color, specific gravity, fracture, cleavage, luster etc. Know all about physical and thermal properties of Gneiss and Obsidian.