Brazilianite and Spinel Physical Properties

Brazilianite

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

2.98-2.993.64-3.66

1 7.18

1.5 Fracture

Conchoidal, Gems

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

(010) Distinct to good

None, but may exhibit slight parting

1.7 Mohs Hardness

5.58

2 10

1.8 Chemical Composition

NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

MgAl₂O₄

Brazilianite and Spinel Chemical Formula

While comparing Brazilianite 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 Brazilianite and Spinel chemical formula.

Chemical formula of Brazilianite- NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Spinel- MgAl₂O₄

Compare Green Gemstones

Brazilianite Vs Chalcopyrite

Brazilianite Vs Chlorastrolite

Brazilianite Vs Chlorapatite

Brazilianite and Spinel Specific Gravity

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