A blue to green stone that washes up on the shores of Leland and Elk Rapids, Michigan. They are not stones but glass left over as a byproduct of smelting iron during the 1870′s. As a cauldron of hot iron melts, limestone is tossed in as a flux, and the molten dirt floats to the top and is skimed off to form glass. Then, as the story goes, the chunks of glass were used as fill for breakwalls or dumped anywhere, often in Lake Michigan. Through the decades it has been tumbled by the waves of Lake Michigan. Although scarce, it can make beautiful recycled jewelry and art.