Pure Source India 4" Wide Black Marble Stone Mortar And Pestle Set As Spice, Medicine Grinder Masher - Okhli And Musal. Good quality Mortar and pestle set coming in 4 inch size which is very useful for your home use. this size is not very big , not very small , it is well running size which is useful for all application . A pestle and mortar is a device used since time to times to prepare ingredients or substances by crushing and grinding them into a fine paste or powder. The mortar is a bowl, typically made of stone. The pestle is a heavy and blunt club-shaped object, the end of which is used for crushing and grinding. The substance to be ground is placed in the mortar and ground, crushed or mixed using a pestle. Mortars and pestles have been used in cooking up to the present day; they are frequently also associated with the profession of pharmacy due to their historical use in preparing medicines. They can also be used in masonry and in other types of construction.