Druse (geology)

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Druse of uvarovite from the Urals (size: 18.3 x 13.1 x 2.0 cm)
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)

In geological usage druse or druzy is 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.

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