Onyx and Watermelon Tourmaline Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
2.90-3.40
Fracture
Not Available
Uneven, Conchoidal, Uneven, Irregular, Conchoidal, Management Team (2012)
Cleavage
Indiscernible
Not Available
Mohs Hardness
6.5-7
7-7.5
Chemical Composition
SiO2
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Onyx and Watermelon Tourmaline Chemical Formula
While comparing Onyx and Watermelon 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 Onyx and Watermelon Tourmaline chemical formula.
- Chemical formula of Onyx- SiO2
- Chemical formula of Watermelon Tourmaline- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Onyx and Watermelon Tourmaline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Onyx and Watermelon Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Watermelon Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.90-3.40 whereas that of Watermelon Tourmaline is 2.90-3.40.