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% |
| Density | Min. 160#/ft |
| Compressive strength | Min. 2000 psi |
| Modulus of rupture | 2000 psi |
| Abrasion resistance | 8 |