Iolite and Periclase Physical Properties

Iolite

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

2.6-2.73.7-3.9

1 7.18

1.5 Fracture

Not Available

Conchoidal, Brittle

1.6 Cleavage

3,1

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

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Iolite and Periclase Chemical Formula

While comparing Iolite 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 Iolite and Periclase chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

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Iolite and Periclase Specific Gravity

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