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Erythrite
Erythrite

Tanzanite
Tanzanite



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Erythrite and Tanzanite Physical Properties

1 Physical Properties
1.1 Tenacity
Sectile
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Hard
1.4 Specific Gravity
3.06
3.35
1.5 Fracture
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
Perfect {010}, imperfect {100}
1.7 Mohs Hardness
Not Available
6.5-7
1.8 Chemical Composition
Co3(AsO4)2•8(H2O)
Ca2Al3(SiO4)3(OH)

Erythrite and Tanzanite Chemical Formula

While comparing Erythrite and Tanzanite 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 Erythrite and Tanzanite chemical formula.

  • Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
  • Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)

Erythrite and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.35 whereas that of Tanzanite is 3.35.