Beach glass, as it is called on inland waterways such as Chesapeake Bay and the Great Lakes, is similar to sea glass, but may be less weathered in the absence of wave rigor and oceanic saline content. Beach glass from inland regions often has prominently embossed designs or letters on it, which can make tracing its origin less challenging. The outer surface of beach glass shards may also be texturally varied, with one side frosty and the other shiny. This is most likely because they are pieces broken off from larger glass objects which are themselves still embedded in mud, silt or clay, slowly being exposed by wave action and erosion.
Red sea glass is the rarest colour. It is so rare because it was only made for a small period in time, and gold was one of its ingredients. Sea glass is getting less common because fewer things are made out of glass today. Many years ago most containers were made of glass – medicine, poison, drinks, water. Sea glass is most often found at the top of the shoreline. Before keeping, make sure that the edges are soft and well-worn, if not, they’re not actually sea glass, just glass.