American Olean Delfino Stone Paradise Blend 12-in x 12-in Honed Natural Stone Pebble Floor and Wall Tile (0.95-sq. ft/ Piece) in the Tile department at Lowes.com
Tips for installing and cleaning a pebble-stone shower floor - The Washington Post
Pebble Shower Floors for Tiled Showers - How-to Install Small Rocks | Tile Your World