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Lazulite
Lazulite

Forsterite
Forsterite



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Lazulite
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Forsterite

Lazulite and Forsterite Physical Properties

Physical Properties

Tenacity

-
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.04-3.173.23-3.26
1 7.18
👆🏻

Fracture

Uneven
Conchoidal

Cleavage

{001} Indistinct, {???} Indistinct
Perfect on {010} imperfect on {100}

Mohs Hardness

5.56.5-7
2 10
👆🏻

Chemical Composition

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Lazulite and Forsterite Chemical Formula

While comparing Lazulite and Forsterite 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 Lazulite and Forsterite chemical formula.

  • Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
  • Chemical formula of Forsterite- Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Lazulite and Forsterite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazulite and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazulite and Forsterite Optical Properties during the identification of gemstone. Specific gravity of Lazulite is 3.23-3.26 whereas that of Forsterite is 3.23-3.26.