Schorl and Andradite Physical Properties

Schorl

Andradite

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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

3.18-3.223.70-4.10

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{1011} Indistinct

none

1.7 Mohs Hardness

Not Available6.5-7

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)

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Schorl and Andradite Chemical Formula

While comparing Schorl and Andradite 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 Andradite 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 Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Compare Black Gemstones

Schorl Vs Snowflake Obsidian

Schorl Vs Xenotime

Schorl Vs Triplite

Schorl and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Schorl and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Schorl and Andradite Optical Properties during the identification of gemstone. Specific gravity of Schorl is 3.70-4.10 whereas that of Andradite is 3.70-4.10.