Uvite and Polyhalite Physical Properties

Uvite

Polyhalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.97-3.142.78

1 7.18

1.5 Fracture

Uneven, Conchoidal, Brittle

Conchoidal, Brittle

1.6 Cleavage

{1011} Indistinct

Perfect on {10 1 }; parting on {010}

1.7 Mohs Hardness

Not Available3.5

2 10

1.8 Chemical Composition

Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Not Available

Uvite and Polyhalite Chemical Formula

While comparing Uvite and Polyhalite 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 Uvite and Polyhalite chemical formula.

Chemical formula of Uvite- Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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Uvite Vs Yttrium Aluminium Garnet

Uvite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Uvite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Uvite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Uvite is 2.78 whereas that of Polyhalite is 2.78.