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.
- Klein, Cornelis and Cornelius S Hurbut, Jr, Manual of Mineralogy, Wiley, 20th ed. 1985, P.199 ISBN 0-471-80580-7