Spessartine and Astrophyllite Physical Properties

Spessartine

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

4.12-4.183.2-3.4

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Conchoidal, Brittle

Uneven, Brittle, Metallic

1.6 Cleavage

{???} Distinct

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

7-7.53

2 10

1.8 Chemical Composition

Mn 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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

Spessartine and Astrophyllite Chemical Formula

While comparing Spessartine 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 Spessartine and Astrophyllite chemical formula.

Chemical formula of Spessartine- Mn 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Compare Red Gemstones

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Spessartine and Astrophyllite Specific Gravity

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