Cinnabar and Lapis lazuli Physical Properties

Cinnabar

Lapis lazuli

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1 Physical Properties

1.1 Tenacity

Slightly sectile

Not Available

1.2 Solubility

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

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

22.50-3.00

1 7.18

1.5 Fracture

Uneven, Uneven, Gemstones (2009), Brittle

Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Prismatic {10 1 0}, perfect

3,6

1.7 Mohs Hardness

2-2.55.5

2 10

1.8 Chemical Composition

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

The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

Cinnabar and Lapis lazuli Chemical Formula

While comparing Cinnabar and Lapis lazuli 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 Cinnabar and Lapis lazuli chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

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Cinnabar and Lapis lazuli Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.