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.

Occurrence[edit]

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.

In Jewelry[edit]

Because of its sparkling appearance, druse is sometimes used in jewelry making. Both the the glittering effect of the tiny crystals and the color of the base mineral are factors when selecting druse for this purpose. Many jewelers opt for druse in lieu of rarer gemstones since they are relatively inexpensive and easy to cut.

See also[edit]

References[edit]