Elbaite and Prehnite Physical Properties

Elbaite

Prehnite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.102.80-2.95

1 7.18

1.5 Fracture

Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

Distinct on [001]

1.7 Mohs Hardness

76-6.5

2 10

1.8 Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references

Ca₂Al₂Si₃O₁₂(OH)

Elbaite and Prehnite Chemical Formula

While comparing Elbaite and Prehnite 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 Elbaite and Prehnite chemical formula.

Chemical formula of Elbaite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)

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Elbaite and Prehnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.