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Achroite
Achroite

Blue spinel
Blue spinel



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Achroite
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Blue spinel

Achroite and Blue spinel Physical Properties

Physical Properties

Tenacity

-
-

Solubility

-
-

Durability

-
-

Specific Gravity

2.90-3.40-9999
1 7.18
👆🏻

Fracture

Uneven, ConchoidalWalter Schumann
-

Cleavage

Indiscernible
None

Mohs Hardness

7-7.5-9999
2 10
👆🏻

Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
MgAl2O4

Achroite and Blue spinel Chemical Formula

While comparing Achroite and Blue 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 Achroite and Blue spinel chemical formula.

  • Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
  • Chemical formula of Blue spinel- MgAl2O4

Achroite and Blue spinel Specific Gravity

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