Astrophyllite and Pectolite Physical Properties

Astrophyllite

Pectolite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.42.74-2.90

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Uneven, Gemstones (2009), Splintery

1.6 Cleavage

Perfect on [001] imperfect on [100]

Perfect on {100} and {001}

1.7 Mohs Hardness

34.5-5

2 10

1.8 Chemical Composition

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

Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Astrophyllite and Pectolite Chemical Formula

While comparing Astrophyllite and Pectolite 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 Pectolite 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 Pectolite- Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Compare Green Gemstones

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Astrophyllite and Pectolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Pectolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Pectolite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.74-2.90 whereas that of Pectolite is 2.74-2.90.