Sea glass refers to pieces of glass that have been naturally weathered by the ocean, resulting in smooth, frosted surfaces and softened edges. These pieces of glass often come from bottles, jars, or other glass objects that have broken and been tumbled by waves and sand over time. Sea glass can be found in various colors, with some of the most common being green, brown, and white, while rarer colors include blue, red, and purple. The unique shapes, sizes, and colors of sea glass make it popular for use in jewelry, art, and decorative crafts.