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Boracite
Boracite

Mottramite
Mottramite



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Boracite
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Mottramite

Boracite and Mottramite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
Soluble

Durability

-
-

Specific Gravity

2.95-2.965.9
1 7.18
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Fracture

Conchoidal
Sub-Conchoidal

Cleavage

None
None observed

Mohs Hardness

7-7.53
2 10
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Chemical Composition

Mg 3B 7O 13ClMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
PbCu(VO4)(OH)

Boracite and Mottramite Chemical Formula

While comparing Boracite and Mottramite 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 Boracite and Mottramite chemical formula.

  • Chemical formula of Boracite- Mg 3B 7O 13ClMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Mottramite- PbCu(VO4)(OH)

Boracite and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boracite and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boracite and Mottramite Optical Properties during the identification of gemstone. Specific gravity of Boracite is 5.9 whereas that of Mottramite is 5.9.