Sea pottery (also known as sea china, sea porcelain or beach pottery) is pottery which is broken into worn pieces and shards and found on beaches along oceans or large lakes. Sea pottery has been tumbled and smoothed by the water and sand, creating small pieces of smooth, frosted pottery. It is often collected with more common sea glass by beachcombers.^[1]

Sea pottery originates from pottery, including earthenware, stoneware and porcelain which breaks into smaller pieces and is smoothed by the acidity and motion of an ocean or lake. The sand or grit polishes the edges like a natural tumbler. Much of the sea pottery in the United Kingdom and United States originates from discarded 18th and 19th century porcelain made in Europe and America.^{[citation needed]} Some sea pottery contains discernible patterns, such as flowers, figures, historic places and scenes, or hallmarks, factory stamps and dates which allow the pottery to be dated using pottery reference guides.^[2]

Sea pottery shards can give insights into historical trade routes, manufacturing techniques, and daily life in previous centuries. Pottery pieces can be traced back to specific manufacturers and periods, providing information for historians and archaeologists.

Collecting sea pottery has become a popular hobby among beachcombers and collectors, with finds being valued not only for their aesthetic appeal but also for the historical context they provide.

Sea pottery is often used in household decorations and furnishings as well as jewellery. Some enthusiasts fill jars with sea pottery to display. Because most sea pottery originates from turn of the 20th century ceramics (glass and ceramics were used more widely for consumables before plastic) it is becoming increasingly less common to find these pieces.^{[citation needed]}

Sea pottery highlights issues related to marine debris and ocean pollution. Many pieces of sea pottery originated from discarded or shipwrecked items, demonstrating the long history of human impact on marine environments. Collectors and environmentalists often work together to clean up beaches, finding sea pottery while also removing harmful debris.

Efforts to conserve and protect coastal environments play a crucial role in preserving sea pottery. Beach clean-ups and educational programs help raise awareness about marine pollution and the importance of protecting our oceans. Conservationists emphasize responsible collecting practices to ensure that natural habitats are not disturbed.

Certain locations around the world are renowned for their abundance of sea pottery. Beaches in the United Kingdom, such as Seaham Beach in County Durham, and sites in the United States, like Glass Beach in California, are famous for their rich deposits of sea pottery and glass. These sites attract tourists and collectors alike, eager to find unique pieces.

• Richard LaMotte, "Pure Sea Glass," (Chestertown, MD: Sea Glass Publishing, 2004).
• C.S. Lambert, Sea Glass Chronicles: Whispers from the Past, (Down East Book, Camden, ME: 2001)
• Palmer, Lisa (June 4, 2007). "Strolling the shore for sea glass". Fortune Small Business.
• Koncius, Jura (August 11, 2005). "Look What the Tide Brought In". The Washington Post.

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