Sumerian cylinder seals are made of stones but sometimes ivory, bone, faience, glass, metal, wood, and baked clay. It is used for personal signatures and documents.
Sumerian cylinder seals were first used in Mesopotamia. It was used as a mark of ownership and identification. Seals were impressed on lumps of clay that used to close jars, doors, and baskets.
The main purpose of Sumerian cylinder seals was to use as administrative tools, a form of signature, jewelry, legitimize a business deal, and magical amulets.
Therefore the Sumerian cylinder seals helped in trade and commerce in ancient times.
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