Andradite and Herderite Physical Properties

Andradite

Herderite

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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

3.70-4.102.90-3.02

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

none

Indistinct on {110}

1.7 Mohs Hardness

6.5-75-5.5

2 10

1.8 Chemical Composition

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

CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Andradite and Herderite Chemical Formula

While comparing Andradite and Herderite 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 Herderite chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Compare Green Gemstones

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Andradite and Herderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Andradite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.