Shigaite and Pleonaste Physical Properties

Shigaite

Pleonaste

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1 Physical Properties

1.1 Tenacity

Moderately ﬂexible

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.323.80

1 7.18

1.5 Fracture

Flexible Flexible fragments.

Not Available

1.6 Cleavage

Perfect on {0001}

Not Available

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Not Available

(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

Shigaite and Pleonaste Chemical Formula

While comparing Shigaite and Pleonaste 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 Shigaite and Pleonaste chemical formula.

Chemical formula of Pleonaste- (Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

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Shigaite and Pleonaste Specific Gravity

Another important criteria for qualitative analysis of gemstones is Shigaite and Pleonaste Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Shigaite and Pleonaste Optical Properties during the identification of gemstone. Specific gravity of Shigaite is 3.80 whereas that of Pleonaste is 3.80.