Emerald and Norbergite Physical Properties

Emerald

Norbergite

Norbergite and Emerald Physical Properties

Physical Properties

Tenacity

Not Available

Solubility

Not Available

Durability

Hard

Not Available

Specific Gravity

2.67-2.78

3.177

Fracture

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

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Cleavage

Imperfect on the [0001]

{???} Distinct

Mohs Hardness

7.5-8

6-6.5

Chemical Composition

Be₃Al₂SiO₆

Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)

Optical Properties >>

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Emerald and Norbergite Chemical Formula

While comparing Emerald and Norbergite 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 Emerald and Norbergite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Norbergite- Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)

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Emerald and Norbergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Emerald and Norbergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Emerald and Norbergite Optical Properties during the identification of gemstone. Specific gravity of Emerald is 3.177 whereas that of Norbergite is 3.177.