Danburite and Astrophyllite Physical Properties

Danburite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.97-3.033.2-3.4

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

Uneven, Brittle, Metallic

1.6 Cleavage

{001} Poor

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Danburite and Astrophyllite Chemical Formula

While comparing Danburite and Astrophyllite 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 Danburite and Astrophyllite chemical formula.

Chemical formula of Danburite- CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

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Danburite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Danburite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Danburite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Danburite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.