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Astrophyllite
Astrophyllite

Hurlbutite
Hurlbutite



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Astrophyllite
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Hurlbutite

Astrophyllite and Hurlbutite 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
3.2-3.4
2.90
1.5 Fracture
Uneven, Brittle, Metallic
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
1.6 Cleavage
Perfect on [001] imperfect on [100]
None
1.7 Mohs Hardness
3
6
1.8 Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
CaBe 2(PO 4) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Astrophyllite and Hurlbutite Chemical Formula

While comparing Astrophyllite and Hurlbutite 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 Hurlbutite 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 Hurlbutite- CaBe 2(PO 4) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Astrophyllite and Hurlbutite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Hurlbutite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Hurlbutite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.90 whereas that of Hurlbutite is 2.90.