|Sunstone is a plagioclase feldspar, which when viewed from certain directions exhibits a brilliant spangled appearance; this has led to its use as a gemstone. It has been found in Southern Norway, and in the U.S. It is the official gemstone of Oregon.|
Oregon sunstone is found in Harney County, Oregon and in eastern Lake County north of Plush. Oregon sunstone contains inclusions of copper crystals. The copper leads to variant color within some stones, where turning one stone will result in manifold hues: the more copper within the stone, the darker the complexion.