Common Opal and Scolecite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
1.98-2.50
2.20-2.23
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Irregular/uneven, UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Uneven
Cleavage
Not Available
Perfect on {110} and {1 1 0}
Mohs Hardness
5.5-6.5
5-5.5
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.
Common Opal and Scolecite Chemical Formula
While comparing Common Opal and Scolecite 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 Common Opal and Scolecite chemical formula.
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
- Chemical formula of Scolecite- CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.
Common Opal and Scolecite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Common Opal and Scolecite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Scolecite Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 2.20-2.23 whereas that of Scolecite is 2.20-2.23.