Caledonite and Prehnite Physical Properties

Caledonite

Prehnite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.6-5.762.80-2.95

1 7.18

1.5 Fracture

Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)

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

1.6 Cleavage

[001] perfect; [100] distinct

Distinct on [001]

1.7 Mohs Hardness

2.5-36-6.5

2 10

1.8 Chemical Composition

Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

Ca₂Al₂Si₃O₁₂(OH)

Caledonite and Prehnite Chemical Formula

While comparing Caledonite 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 Caledonite and Prehnite chemical formula.

Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)

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Caledonite and Prehnite Specific Gravity

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