Druse (geology)
![Druse of uvarovite from the Urals (size: 18.3 x 13.1 x 2.0 cm)](/Images/godic/202501/10/Uvarovite-tuc09103f5353.jpg")
![Pink dolomite druse with yellow calcite crystals, Ben Hogan Quarry, Lawrence County Zinc District, Arkansas (size: 14.9 x 8.5 x 3.7 cm)](/Images/godic/202501/10/Calcite-Dolomite-710095353.jpg")
In geology, druse refers to a coating of fine crystals on a rock fracture surface, vein or within a vug or geode.
Druse occurs worldwide, the most common is perhaps quartz druse within voids in chert or agates. Garnet, calcite, dolomite and a variety of minerals may occur as druse coatings.