Hyalite Opal

Hyalite Opal is one of the brightest fluorescent minerals known to man. A true form of Opal, these specimens were formed underground approximately 380 million years ago in the Blue Ridge Mountains of Mitchell County, NC. The Hyalite forms a nearly invisible coating on specimens of Quartz, Feldspar and Mica. It is fluorescent under longwave ultraviolet light (368 NM) and even brighter under shortwave ultraviolet light (254 NM).