Pearl and Astrophyllite Physical Properties

Pearl

Astrophyllite

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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

2.60-2.853.2-3.4

1 7.18

1.5 Fracture

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

Uneven, Brittle, Metallic

1.6 Cleavage

none

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

2.5-4.53

2 10

1.8 Chemical Composition

Not Available

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

Pearl and Astrophyllite Chemical Formula

While comparing Pearl 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 Pearl and Astrophyllite chemical formula.

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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Pearl Vs Prase Opal

Pearl and Astrophyllite Specific Gravity

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