Sequatchie Gray and Varigated Flagstone

Technical Data for Sequatchie Gray and Varigated Flagstone

Property Value
Type Tennessee Quartzite
Classification III quartzite; flagstone
Colors gray or varigated
Patterns random; irregular
Finish natural cleft
Absorption Max. 1.53%
Density Min. 160#/ft
Compressive strength (dry or saturated) Min. 12000# psi
Modulus of rupture 12000 psi
Abrasion resistance 8

Chemical Composition

Alumina 2.98%
Iron oxide 0.72%
Magnesium oxide 0.42%
Titanium oxide 0.25%
Calcium oxide 0.10%
Loss on ignition 0.60%
Silica (by difference) 94.93%

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