Onyx and Ludlamite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
3.1-3.2
Fracture
Not Available
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Cleavage
Indiscernible
Vitreous, pearly on cleavage
Chemical Composition
SiO2
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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 OâDonoghue , 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.