pewter shell platesvintage pewter shell shaped dishes perfect for displaying soap, jewelry, or for leaving your keys in. pewter is an alloy metallic material that has been in use since the roman ages! pewter is generally mostly tin material, mixed in with some copper or antimony to make the material harder. post roman era, pewter fell into disuse until the 12th century, when monks began to perfect the craft again. in the 17th and 18th centuries, pewter became quite