Periclase and Almandine Physical Properties

Periclase

Almandine

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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

3.7-3.93.95-4.30

1 7.18

1.5 Fracture

Conchoidal, Brittle

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

{001} perfect; {111} imperfect, may exhibit parting on , {011}

none

1.7 Mohs Hardness

5.5-67-7.5

2 10

1.8 Chemical Composition

MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Periclase and Almandine Chemical Formula

While comparing Periclase and Almandine 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 Periclase and Almandine chemical formula.

Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Periclase and Almandine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Periclase and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Periclase and Almandine Optical Properties during the identification of gemstone. Specific gravity of Periclase is 3.95-4.30 whereas that of Almandine is 3.95-4.30.