Amazonite and Lapis lazuli Physical Properties

Amazonite

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

2.55-2.572.50-3.00

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

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

1.6 Cleavage

2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal

3,6

1.7 Mohs Hardness

6-6.55.5

2 10

1.8 Chemical Composition

KAlSi₃O₈

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

Amazonite and Lapis lazuli Chemical Formula

While comparing Amazonite 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 Amazonite and Lapis lazuli chemical formula.

Chemical formula of Amazonite- KAlSi₃O₈
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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Amazonite and Lapis lazuli Specific Gravity

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