Concrete Mold Mosaic Stone Mold MS 822 Plaster Form Concrete Stone Veneer Mold. Mosaic Mold Globmarble supplies professional grade casting molds which reproduce the structure and relief of natural stone to the smallest details. GlobMarble molds are designed to produce many parts and will last you many years by using a little common sense and incorporating a maintenance plan. Mold size  2 SQ.FT.(0.20m2) approximate. Measurements  24 1/4 X 13 1/4 X 1 (61.5cm X 33.5cm X 2,5cm) Mold sections  1 Section dimensions: 23 X 11 3/4 X  "(58.5cm X 30cm X 1 cm). HOW TO MAKE CONCRETE STONE: Apply release (can be used liquid soap). Mix concrete per instruction, add colors, vibrate the mold lightly to remove an air bubbles, remove the stone in 24 hours.