Fayalite and Sunstone Physical Properties

Fayalite

Sunstone

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.3922.62-2.65

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Gemstones of the world (2001)

1.6 Cleavage

{010} moderate, {100} imperfect

001

1.7 Mohs Hardness

6.5-76

2 10

1.8 Chemical Composition

Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

Fayalite and Sunstone Chemical Formula

While comparing Fayalite and Sunstone 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 Fayalite and Sunstone chemical formula.

Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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Fayalite and Sunstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fayalite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fayalite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Fayalite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.