Spinel and Milarite Physical Properties

Spinel

Milarite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.662.52-2.60

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

None, but may exhibit slight parting

{0001} Imperfect, {1120} Imperfect

1.7 Mohs Hardness

85.5-6

2 10

1.8 Chemical Composition

MgAl₂O₄

KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Spinel and Milarite Chemical Formula

While comparing Spinel and Milarite 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 Spinel and Milarite chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Milarite- KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Spinel and Milarite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Milarite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Milarite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 2.52-2.60 whereas that of Milarite is 2.52-2.60.