Poldervaartite and Spinel Physical Properties

Poldervaartite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

2.913.64-3.66

1 7.18

1.5 Fracture

Handbook of mineralogy (2001)

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

None, but may exhibit slight parting

1.7 Mohs Hardness

Not Available8

2 10

1.8 Chemical Composition

(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

MgAl₂O₄

Poldervaartite and Spinel Chemical Formula

While comparing Poldervaartite and Spinel 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 Poldervaartite and Spinel chemical formula.

Chemical formula of Poldervaartite- (Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)
Chemical formula of Spinel- MgAl₂O₄

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Poldervaartite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Poldervaartite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poldervaartite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Poldervaartite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.