Small Yooperlite sphere

Yooperlite is a unique variety of rock that gained popularity in recent years, particularly among collectors and enthusiasts. It's essentially a type of syenite, a coarse-grained igneous rock, which contains fluorescent sodalite minerals. The term "Yooperlite" is a combination of "Yooper," a nickname for people from Michigan's Upper Peninsula (UP), and "lite," referring to its fluorescent properties.

When exposed to certain types of ultraviolet (UV) light, particularly long-wave UV light commonly used in UV lamps, Yooperlites emit a vibrant glow, often described as a bright yellow-green or bluish-green. This fluorescence is due to the presence of the mineral sodalite within the rock.

Yooperlites have become popular for their unique appearance and the thrill of finding them in the field, particularly during nighttime excursions with UV lights. Collectors often polish Yooperlites to enhance their appearance and create decorative pieces or jewelry.

The discovery and subsequent popularity of Yooperlites have led to organized rock-hunting events and a growing community of enthusiasts who enjoy exploring the beaches and rocky areas of Michigan's Upper Peninsula in search of these glowing rocks.