Ruby Gem Double-Sided Mahjong MatBring twice the brilliance to your game with our Ruby Gem Double Sided Mahjong Mat. One side features one large faceted ruby and the other side a pattern of all of our Jewel Collection jewels. This mat creates a stunning backdrop, especially to our Jewels! Ruby House Tiles, but is designed to mix and match with any tiles in the Jewels House Collection, adding many interesting facets to every jewel of a game.