Schorl and Poudretteite Physical Properties

Schorl

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

3.18-3.222.51-2.53

1 7.18

1.5 Fracture

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

Conchoidal, Splintery

1.6 Cleavage

{1011} Indistinct

None

1.7 Mohs Hardness

Not Available5

2 10

1.8 Chemical Composition

Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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

Schorl and Poudretteite Chemical Formula

While comparing Schorl 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 Schorl and Poudretteite chemical formula.

Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Black Gemstones

Schorl Vs Snowflake Obsidian

Schorl Vs Xenotime

Schorl Vs Triplite

Schorl and Poudretteite Specific Gravity

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