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Mimetite
Mimetite

Sillimanite
Sillimanite



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Mimetite
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Sillimanite

Mimetite and Sillimanite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Tough
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
7.103.20-3.26
Amber
1 7.18
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Splintery
1.6 Cleavage
[10 1 1] Imperfect
{010} perfect
1.7 Mohs Hardness
3.56-7.5
Amber
2 10
1.8 Chemical Composition
Pb 5(AsO 4) 3ClMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Mimetite and Sillimanite Chemical Formula

While comparing Mimetite and Sillimanite 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 Mimetite and Sillimanite chemical formula.

  • Chemical formula of Mimetite- Pb 5(AsO 4) 3ClMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Mimetite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mimetite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mimetite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Mimetite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.