Staurolite and Opal Physical Properties

Staurolite and Opal Chemical Formula

While comparing Staurolite and Opal 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 Staurolite and Opal chemical formula.

• Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
• Chemical formula of Opal- SiO₂ · nH₂O

Staurolite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Opal Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 1.98-2.25 whereas that of Opal is 1.98-2.25.