Ludlamite and Cinnabar Physical Properties

Ludlamite

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

3.1-3.22

1 7.18

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Fracture

Uneven

Cleavage

Vitreous, pearly on cleavage

Prismatic {10 1 0}, perfect

Mohs Hardness

3-42-2.5

2 10

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Chemical Composition

(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Ludlamite and Cinnabar Chemical Formula

While comparing Ludlamite 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 Ludlamite and Cinnabar chemical formula.

Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Ludlamite and Cinnabar Specific Gravity

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