Almandine and Periclase Physical Properties

Almandine

Periclase

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.303.7-3.9

1 7.18

1.5 Fracture

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

Conchoidal, Brittle

1.6 Cleavage

none

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

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

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

MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Almandine and Periclase Chemical Formula

While comparing Almandine and Periclase 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 Almandine and Periclase chemical formula.

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

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Almandine and Periclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Periclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Periclase Optical Properties during the identification of gemstone. Specific gravity of Almandine is 3.7-3.9 whereas that of Periclase is 3.7-3.9.