Amethyst and Tourmaline Physical Properties
Tenacity
Not Available
Not Available
Solubility
insoluble in common solvents
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.65
2.85-3.35
Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Indiscernible
Indistinct
Chemical Composition
SiO2
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Amethyst and Tourmaline Chemical Formula
While comparing Amethyst 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 Amethyst and Tourmaline chemical formula.
- Chemical formula of Amethyst- SiO2
- Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Amethyst and Tourmaline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Amethyst and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.