- Sea glass are naturally weathered pieces of the anthropogenic glass fragments of typically drinkwares, which often have the appearance of tumbled stones. Sea glass is physically polished and chemically weathered glass found on beaches along bodies of salt water. These weathering processes produce natural frosted glass. Sea glass is used for decoration, most commonly in jewellery. “Beach glass” comes from fresh water and is often less frosted in appearance than sea glass. Sea glass takes 20–40 years, and sometimes as much as 100–200 years, to acquire its characteristic texture and shape. It is also colloquially referred to as drift glass from the longshore drift process that forms the smooth edges. In practice, the two terms are used interchangeably.