Brazilian Black Slate is the most popular slate option. The Brazilian slates are known for their gentle surface. The clefts are quite fine and so do not affect chair legs and so forth.
4 size grand opus pattern consists of 900 x 600, 600 x 600, 600 x 300 and 295 x 295mm
Calibrated to 10mm thickness.
Available in an array of sizes including patterns and strips