Opal and Carletonite Physical Properties
Tenacity
BrittleWalter Schumann
Brittle
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.45
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Conchoidal, Conchoidal, Brittle
Cleavage
None
Perfect on {001}, good on {110}
Mohs Hardness
5-6.5
4-4.5
Chemical Composition
SiO2 · nH2O
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Opal and Carletonite Chemical Formula
While comparing Opal and Carletonite 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 Opal and Carletonite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Carletonite- KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Opal and Carletonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Carletonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Carletonite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.45 whereas that of Carletonite is 2.45.