Andradite and Cobaltite Physical Properties

Andradite

Cobaltite

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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

3.70-4.106.3

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)

UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic

1.6 Cleavage

none

{100} Good, {010} Good, {001} Good

1.7 Mohs Hardness

6.5-75.5

2 10

1.8 Chemical Composition

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

CoAsSAnthony et al , Handbook of mineralogy (2001)

Andradite and Cobaltite Chemical Formula

While comparing Andradite and Cobaltite 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 Andradite and Cobaltite chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

Compare Green Gemstones

Andradite Vs Astrophyllite

Andradite Vs Augite

Andradite Vs Aragonite

Andradite and Cobaltite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite and Cobaltite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Cobaltite Optical Properties during the identification of gemstone. Specific gravity of Andradite is 6.3 whereas that of Cobaltite is 6.3.