Obsidian and Tanzanite Physical Properties

Obsidian and Tanzanite Chemical Formula

While comparing Obsidian and Tanzanite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Obsidian and Tanzanite chemical formula.

• Chemical formula of Obsidian- SiO2
• Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)

Obsidian and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Obsidian and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 3.35 whereas that of Tanzanite is 3.35.