Whistler basalt flagstone is sawn top and bottom with the option of a sand blasted top to prevent slipping. Great for patios, stairs and stepping stones. Whisler Basalt Patio comes sawn top and bottom with a sandblasted top and random shapes. Whistler Basalt is a volcanic rock found in the hills of Whistler, B.C. It’s all weathered coloumns naturally fit into any landscape. The charcoal inside mixed with the weathered outside make Whistler Basalt a truly unique building stone |