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Sillimanite
Sillimanite

Adamite
Adamite



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Sillimanite and Adamite Physical Properties

1 Physical Properties
1.1 Tenacity
Tough
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.20-3.26
4.32-4.48
1.5 Fracture
Splintery
Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic
1.6 Cleavage
{010} perfect
{101}, good; {010}, poor
1.7 Mohs Hardness
6-7.5
3.5
1.8 Chemical Composition
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)
Zn 2(AsO 4)(OH)Michael O’Donoghue , Gems, Sixth edition (2006)

Sillimanite and Adamite Chemical Formula

While comparing Sillimanite and Adamite 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 Sillimanite and Adamite chemical formula.

  • Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael O’Donoghue , Gems, Sixth edition (2006)

Sillimanite and Adamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Adamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Adamite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 4.32-4.48 whereas that of Adamite is 4.32-4.48.