Schorl and Coral Physical Properties

Schorl

Coral

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.18-3.222.60-2.70

1 7.18

1.5 Fracture

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

Irregular, Irregular, Gemstones of the world (2001)

1.6 Cleavage

{1011} Indistinct

Not Available

1.7 Mohs Hardness

Not Available3-4

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)

CaCO 3Ulrich Henn and Claudio C.

Schorl and Coral Chemical Formula

While comparing Schorl and Coral 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 Coral 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 Coral- CaCO 3Ulrich Henn and Claudio C.

Compare Black Gemstones

Schorl Vs Triplite

Schorl Vs Xenotime

Schorl Vs Snowflake Obsidian

Schorl and Coral Specific Gravity

Another important criteria for qualitative analysis of gemstones is Schorl and Coral Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Schorl and Coral Optical Properties during the identification of gemstone. Specific gravity of Schorl is 2.60-2.70 whereas that of Coral is 2.60-2.70.