Garnet, calcite, dolomitic and a variety of minerals may occur as druse coatings. A cluster of small crystals coating the walls of a cavity are called druse. The crystals, forming a druse over the mother rock, are very small; is considered large. From the Beirut International Airport Druse militia artillery began harassing the Marines. The inner surfaces of such vugs are often coated with a crystal druse. It was divided into three quarters, with Muslim, Christian and Druse inhabitants. "Dregs", and the geological term "druse" are also thought to be etymologically related. Groups of Arab and Druse were patrolling the Hauran, ready to capture any weakly-guarded convoy. Because of its sparkling appearance, druse is sometimes used in jewelry making.