This could also be concrete or clay blocks, pre-solid concrete flags, natural stone or some other form of paving. 3x3 sq. cobblestone driveway & patio paver with an aged end. Perfect for paver mosaics. Budget-pleasant patio or driveway paving stone with an outdated world look. Diamond-form concrete paver with a rough slip-resistant texture for contemporary driveway, patio or walkw ay designs.