Amazon.com: UCLAYS SEVERSKY edible Chalk chunks (lump) natural for eating (food), 4 oz (113 g) : Tools & Home Improvement
Amazon.com: WHITE MOUNTAIN edible Chalk chunks (lump) natural for eating (food), 1 lb (450 g) : Grocery & Gourmet Food
Chalkovsky Edible Chalk Chunks - Natural Chalk for Eating - Crunchy Belgorod Chalk Chunks - Russian Organic Chalk for Bone Strength - Zero Additives, No Impurities - White 7oz (200g)