Opal and Herderite Physical Properties
Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.90-3.02
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
None
Indistinct on {110}
Mohs Hardness
5-6.5
5-5.5
Chemical Composition
SiO2 · nH2O
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Opal and Herderite Chemical Formula
While comparing Opal and Herderite 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 Herderite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Opal and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Herderite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.90-3.02 whereas that of Herderite is 2.90-3.02.