Milarite and Opal Physical Properties

Milarite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

2.52-2.601.98-2.25

1 7.18

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

{0001} Imperfect, {1120} Imperfect

None

1.7 Mohs Hardness

5.5-65-6.5

2 10

1.8 Chemical Composition

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

SiO₂ · nH₂O

Milarite and Opal Chemical Formula

While comparing Milarite and Opal 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 Milarite and Opal chemical formula.

Chemical formula of Milarite- KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Opal- SiO₂ · nH₂O

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Milarite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Milarite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Milarite and Opal Optical Properties during the identification of gemstone. Specific gravity of Milarite is 1.98-2.25 whereas that of Opal is 1.98-2.25.