Precious Opal and Tourmaline Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.85-3.35
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Not Available
Indistinct
Mohs Hardness
5-6.5
7-7.5
Chemical Composition
SiO 2 · nH 2OGemdat.org , Management Team (2012)
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Precious Opal and Tourmaline Chemical Formula
While comparing Precious 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 Precious Opal and Tourmaline chemical formula.
- Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
- Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Precious Opal and Tourmaline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Precious Opal and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.