Fire Opal and Apophyllite KF Physical Properties

Fire Opal

Apophyllite KF

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.97-2.222.33-2.37

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001)

Uneven, Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Not Available

Perfect on {001}, imperfect on {110}

1.7 Mohs Hardness

6-6.54.5-5

2 10

1.8 Chemical Composition

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Fire Opal and Apophyllite KF Chemical Formula

While comparing Fire Opal and Apophyllite KF 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 Fire Opal and Apophyllite KF chemical formula.

Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)

Compare Red Gemstones

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Fire Opal Vs Hexagonite

Fire Opal and Apophyllite KF Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fire Opal and Apophyllite KF Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fire Opal and Apophyllite KF Optical Properties during the identification of gemstone. Specific gravity of Fire Opal is 2.33-2.37 whereas that of Apophyllite KF is 2.33-2.37.