Prasiolite and Lapis lazuli Physical Properties

Prasiolite

Lapis lazuli

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.652.50-3.00

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

3,1

3,6

1.7 Mohs Hardness

75.5

2 10

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

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

Prasiolite and Lapis lazuli Chemical Formula

While comparing Prasiolite 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 Prasiolite and Lapis lazuli chemical formula.

Chemical formula of Prasiolite- SiO 2Ulrich Henn and Claudio C.
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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Prasiolite and Lapis lazuli Specific Gravity

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