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Forsterite
Forsterite

Tanzanite
Tanzanite



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Forsterite
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Tanzanite

Forsterite and Tanzanite Physical Properties

Physical Properties

Tenacity

-
-

Solubility

-
-

Durability

-
Hard

Specific Gravity

3.23-3.263.35
1 7.18
👆🏻

Fracture

Conchoidal
Uneven, Conchoidal

Cleavage

Perfect on {010} imperfect on {100}
Perfect {010}, imperfect {100}

Mohs Hardness

6.5-76.5-7
2 10
👆🏻

Chemical Composition

Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
Ca2Al3(SiO4)3(OH)

Forsterite and Tanzanite Chemical Formula

While comparing Forsterite 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 Forsterite and Tanzanite chemical formula.

  • Chemical formula of Forsterite- Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)

Forsterite and Tanzanite Specific Gravity

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