Astrophyllite and Jade Physical Properties

Astrophyllite

Jade

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.42.90-3.38

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Gemstones of the world (2001), Difficult, Splintery

1.6 Cleavage

Perfect on [001] imperfect on [100]

1 or 2,2 prismatic.

1.7 Mohs Hardness

36-7

2 10

1.8 Chemical Composition

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

Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

Astrophyllite and Jade Chemical Formula

While comparing Astrophyllite and Jade 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 Jade 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 Jade- Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

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Astrophyllite and Jade Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Jade Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Jade Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.90-3.38 whereas that of Jade is 2.90-3.38.