Pearl and Poudretteite Physical Properties

Pearl

Poudretteite

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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

2.60-2.852.51-2.53

1 7.18

1.5 Fracture

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

Conchoidal, Splintery

1.6 Cleavage

none

None

1.7 Mohs Hardness

2.5-4.55

2 10

1.8 Chemical Composition

Not Available

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Pearl and Poudretteite Chemical Formula

While comparing Pearl and Poudretteite 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 Pearl and Poudretteite chemical formula.

Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

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Pearl Vs Prase Opal

Pearl and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pearl and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pearl and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Pearl is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.