Emerald and Herderite Physical Properties

Emerald

Herderite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Hard

2.67-2.78

Uneven, ConchoidalWalter Schumann

Imperfect on the [0001]

7.5-8

Be₃Al₂SiO₆

2.90-3.02

Subconchoidal, Conchoidal

Indistinct on {110}

5-5.5

CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Emerald and Herderite Chemical Formula

While comparing Emerald and Herderite 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 Herderite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.

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Emerald and Herderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Emerald and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Emerald and Herderite Optical Properties during the identification of gemstone. Specific gravity of Emerald is 2.90-3.02 whereas that of Herderite is 2.90-3.02.