Rock Crystal and Cordierite Iolite Physical Properties

Rock Crystal

Cordierite Iolite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.652.56-2.66

1 7.18

1.5 Fracture

ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Not Available

1.7 Mohs Hardness

77-7.5

2 10

1.8 Chemical Composition

SiO 2Walter Schumann , Gemstones of the world (2001)

Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

Rock Crystal and Cordierite Iolite Chemical Formula

While comparing Rock Crystal and Cordierite Iolite 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 Rock Crystal and Cordierite Iolite chemical formula.

Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)
Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

Compare Blue Gemstones

Rock Crystal Vs Scorzalite

Rock Crystal Vs Serendibite

Rock Crystal Vs Sardonyx

Rock Crystal and Cordierite Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rock Crystal and Cordierite Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rock Crystal and Cordierite Iolite Optical Properties during the identification of gemstone. Specific gravity of Rock Crystal is 2.56-2.66 whereas that of Cordierite Iolite is 2.56-2.66.