Jacobsite and Spinel Physical Properties

Jacobsite

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

4.76-5.033.64-3.66

1 7.18

1.5 Fracture

Conchoidal, Brittle

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

None, but may exhibit slight parting

1.7 Mohs Hardness

5.5-6.58

2 10

1.8 Chemical Composition

(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

MgAl₂O₄

Jacobsite and Spinel Chemical Formula

While comparing Jacobsite 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 Jacobsite and Spinel chemical formula.

Chemical formula of Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Spinel- MgAl₂O₄

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Jacobsite and Spinel Specific Gravity

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