Amazon.com: Edible Chalk Russian Chalk Red 8 Oz (250 gr.) : Grocery & Gourmet Food
VALUYCHIK Edible Chalk Chunks (Clumps) Natural for Eating (Food), 4 oz (110 g) : Amazon.de: Toys
White mountain chalk – India goodie store
Chalk Kuzja ⋆ Umuri
Chalkovsky Premium Edible Chalk - Natural Chalk for Eating - Crunchy Belgorod Chalk Chunks - Russian Organic Chalk for Bone Strength - Zero Additives, No Impurities - White 7oz (200g)