Onyx and Ludlamite Physical Properties

Onyx and Ludlamite Chemical Formula

While comparing Onyx and Ludlamite 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 Onyx and Ludlamite chemical formula.

• Chemical formula of Onyx- SiO₂
• Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Onyx and Ludlamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.