Sugilite and Prehnite Physical Properties

Sugilite

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

2.69-2.792.80-2.95

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Poor on {0001}

Distinct on [001]

1.7 Mohs Hardness

5.5-6.56-6.5

2 10

1.8 Chemical Composition

KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Ca₂Al₂Si₃O₁₂(OH)

Sugilite and Prehnite Chemical Formula

While comparing Sugilite 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 Sugilite and Prehnite chemical formula.

Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)

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Sugilite and Prehnite Specific Gravity

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