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Technical Data for Sequatchie Gray and Varigated Flagstone

TypeTennessee Quartzite
ClassificationIII quartzite; flagstone
Colorsgray or varigated
Patternsrandom; irregular
Finishnatural cleft
AbsorptionMax. 1.53%
DensityMin. 160#/ft
Compressive strength (dry or saturated)Min. 12000# psi
Modulus of rupture12000 psi
Abrasion resistance8


Chemical Composition

Iron oxide0.72%
Magnesium oxide0.42%
Titanium oxide0.25%
Calcium oxide0.10%
Loss on ignition0.60%
Silica (by difference)94.93%