Ultra Rare Sea Marble

Codd balls” or “Codd marbles” are one of the most prized finds for Northwest beachcombers and sea glass collectors. They come from old soda bottles called Codd-neck bottles, invented in 1872 by English engineer Hiram Codd.

These bottles used a glass marble and a rubber gasket instead of a cork or cap to keep carbonation sealed inside the bottle. The pressure from the soda pushed the marble tightly against the seal. When opened, the marble dropped into a chamber in the neck of the bottle.

Collectors in the Northwest often consider finding a perfectly frosted sea marble the “holy grail” of beachcombing because:

• they are naturally shaped,
• take decades to frost,
• and are much rarer than ordinary sea glass shards.