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Ludlamite
Ludlamite

Austinite
Austinite



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Ludlamite
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Austinite

Ludlamite and Austinite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

3.1-3.24.12
1 7.18
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Fracture

-
Uneven

Cleavage

Vitreous, pearly on cleavage
Good in two directions parallel to the prism faces {110}

Mohs Hardness

3-44-4.5
2 10
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Chemical Composition

(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
CaZn(AsO4)(OH)

Ludlamite and Austinite Chemical Formula

While comparing Ludlamite and Austinite 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 Ludlamite and Austinite chemical formula.

  • Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Ludlamite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ludlamite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ludlamite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Ludlamite is 4.12 whereas that of Austinite is 4.12.