| V1 | Low Variation | Shade variation within a box of tiles of a product is minimal. Once installed, the appearance should be uniform. |
| V2 | Moderate Variation | Subtle variations within a box of tiles as you would experience with most natural materials. |
| V3 | High Variation | Tiles share the same color but texture may vary |
| V4 | Random Variation | Highest possible shade variation. Colors and shade are quite different. |