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Astrophyllite
Astrophyllite

Crystal Opal
Crystal Opal



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Astrophyllite
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Crystal Opal

Astrophyllite and Crystal Opal Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.2-3.41.97-2.22
Amber
1 7.18
1.5 Fracture
Uneven, Brittle, Metallic
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on [001] imperfect on [100]
Not Available
1.7 Mohs Hardness
35.5-6.5
Amber
2 10
1.8 Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
SiO 2 + H 2OUlrich Henn and Claudio C.

Astrophyllite and Crystal Opal Chemical Formula

While comparing Astrophyllite and Crystal Opal 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 Astrophyllite and Crystal Opal chemical formula.

  • Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
  • Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

Astrophyllite and Crystal Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Crystal Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Crystal Opal Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 1.97-2.22 whereas that of Crystal Opal is 1.97-2.22.