Umbalite and Cinnabar Physical Properties

Umbalite

Cinnabar

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Physical Properties

Tenacity

Slightly sectile

Solubility

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Durability

Specific Gravity

3.62-4.332

1 7.18

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Fracture

Uneven

Cleavage

Indiscernible

Prismatic {10 1 0}, perfect

Mohs Hardness

7-7.52-2.5

2 10

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Chemical Composition

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

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Umbalite and Cinnabar Chemical Formula

While comparing Umbalite and Cinnabar 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 Cinnabar 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 Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Gems Found In Africa

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Umbalite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Umbalite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Umbalite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Umbalite is 2 whereas that of Cinnabar is 2.