Umbalite and Crocoite Physical Properties

Umbalite

Crocoite

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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

3.62-4.335.90-6.10

1 7.18

1.5 Fracture

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

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).

1.6 Cleavage

Not Available

{110} Distinct, {001} Indistinct, {100} Indistinct

1.7 Mohs Hardness

7-7.52.5-3

2 10

1.8 Chemical Composition

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

PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Umbalite and Crocoite Chemical Formula

While comparing Umbalite and Crocoite 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 Crocoite 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 Crocoite- PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Gems Found In Africa

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Umbalite and Crocoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Umbalite and Crocoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Umbalite and Crocoite Optical Properties during the identification of gemstone. Specific gravity of Umbalite is 5.90-6.10 whereas that of Crocoite is 5.90-6.10.