Yooperlite may look like an unsuspecting gray rock to the naked eye, but the mineral composite makes the rock glow under ultraviolet light. When exposed to UV lighting, the fluorescent Sodalite inclusions within these Syenite stones light up like hot coals are burning inside. Syenite the base material is a igneous rock that solidified slowly in the crust in a similar manner to granite. The biggest difference being the absence or very low quantity of quartz while it is an essential component of granite.
