Eudialyte and Andradite Physical Properties

Eudialyte

Andradite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

H 2 SO 4

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.74-3.003.70-4.10

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Distinct on {0001} imperfect on {11 2 0}

none

1.7 Mohs Hardness

5-5.56.5-7

2 10

1.8 Chemical Composition

Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.

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

Eudialyte and Andradite Chemical Formula

While comparing Eudialyte and Andradite 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 Eudialyte and Andradite chemical formula.

Chemical formula of Eudialyte- Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Eudialyte and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Eudialyte and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Eudialyte and Andradite Optical Properties during the identification of gemstone. Specific gravity of Eudialyte is 3.70-4.10 whereas that of Andradite is 3.70-4.10.