Sea glass and beach glass are naturally weathered pieces of glass, which often have the appearance of tumbled stones. “Sea glass” is physically and chemically weathered glass found on beaches along bodies of salt water. These weathering processes produce natural frosted glass. “Genuine sea glass” can be collected as a hobby and is used for decoration, most commonly in jewelry. “Beach glass” comes from fresh water and is often less frosted in appearance than sea glass. Sea glass takes 20 to 40 years, and sometimes as much as 100 to 200 years, to acquire its characteristic texture and shape.