Umbalite and Labradorite Physical Properties

Umbalite

Labradorite

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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

3.62-4.33

2.69-2.72

1.5 Fracture

Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)

Uneven, Conchoidal, Gems, Sixth Edition (2006)

1.6 Cleavage

Not Available

Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}

1.7 Mohs Hardness

7-7.5

6-6.5

1.8 Chemical Composition

Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)

(Na,Ca)_1-2Si_3-2O₈

Umbalite and Labradorite Chemical Formula

While comparing Umbalite and Labradorite 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 Umbalite and Labradorite chemical formula.

Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈

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Umbalite and Labradorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Umbalite and Labradorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Umbalite and Labradorite Optical Properties during the identification of gemstone. Specific gravity of Umbalite is 2.69-2.72 whereas that of Labradorite is 2.69-2.72.