Crystal Opal and Tourmaline Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
2.85-3.35
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Not Available
Indistinct
Mohs Hardness
5.5-6.5
7-7.5
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Crystal Opal and Tourmaline Chemical Formula
While comparing Crystal Opal and Tourmaline 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 Crystal Opal and Tourmaline chemical formula.
- Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Crystal Opal and Tourmaline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Crystal Opal and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Crystal Opal and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Crystal Opal is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.