Dravite and Periclase Physical Properties

Dravite

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

3.03-3.183.7-3.9

1 7.18

1.5 Fracture

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

Conchoidal, Brittle

1.6 Cleavage

{???} Indistinct

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

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Dravite and Periclase Chemical Formula

While comparing Dravite 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 Dravite and Periclase chemical formula.

Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

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Dravite and Periclase Specific Gravity

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