Prase and Lapis lazuli Physical Properties

Prase

Lapis lazuli

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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

2.64-2.692.50-3.00

1 7.18

1.5 Fracture

Gems, Sixth Edition (2006), Gems, Sixth Edition (2006)

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

1.6 Cleavage

Not Available

3,6

1.7 Mohs Hardness

75.5

2 10

1.8 Chemical Composition

SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Prase and Lapis lazuli Chemical Formula

While comparing Prase 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 Prase and Lapis lazuli chemical formula.

Chemical formula of Prase- SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

Compare Blue Gemstones

Prase Vs Sanidine

Prase Vs Rubellite

Prase Vs Sapphire

Prase and Lapis lazuli Specific Gravity

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