drusy


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drusy

[′drüz·ē]
(geology)
Of or pertaining to rocks containing numerous druses.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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a pin with a past Antique gambling chip cut and embellished with pink tourmaline, cabochon and drusy crystals with pearls by Donna Chambers.
Quartz of the first generation is found very commonly in the main mineralized zone, chiefly as sparkling drusy crusts on cavity walls in the basalt.
C2 is characterized by drusy calcite cement postdating calcite C1 and displays growth zones of dark red luminescence under CL (Figures 4(a) and 4(b)).
There was also malachite in dark green, ropy flows and hemispheres coating cabinet-size pieces of matrix; fine examples of the now familiar Ojuela wulfenite and aurichalcite-included calcite; Milpillas mine azurite; 10-cm subparallel crests of white barite crystals on drusy amethyst (the first good barite from the amethyst fields of Las Vigas, Veracruz); spectacular Navidad mine, Durango creedite and Cerro de Mercado, Durango fluorapatite specimens ...
From Talnakh: white pectolite "puff balls" on drusy crusts of colorless datolite; and crude, barrel-shaped black wurtzite crystals to several centimeters.
Minute (to 1.5 mm) yellow-green distorted octahedrons and cuboctahedrons of bromargyrite have been found on white micro-crystalline drusy quartz, cerussite and plattnerite in a localized area near the portal of the Brown Monster mine.
The deep rose-pink crystals reach 2 cm, and some show sparse drusy coatings of adularian orthoclase; matrix specimens from the find reach 25 cm across (WeiB and Derungs, 2004).
Very sharp, lustrous, metallic gray tetra-hedral crystals of tennantite reaching 2 cm sit up well on drusy quartz and calcite coatings on pale gray matrix.
Minerals found at the Force Crag mine include sphalerite crystals (large, black to dark brown and lustrous) that are sometimes partially covered by honey-yellow drusy to botryoidal siderite.
The Tynebottom mine has produced an interesting suite of nickel and cobalt-containing minerals including erythrite, safflorite, nickel-skullerudite, violarite, rammelsbergite, annabergite, and some very attractive specimens of drusy calcite and "flowstone" colored pink to deep magenta by micro-inclusions of erythrite, or blue by copper salts.
The Boltsburn mine is famous for particularly large and transparent crystals of lavender to purple, yellow and pale olive-green fluorite, lustrous cuboctahedral crystals of galena, and "nail-head" calcite, sometimes in association with siderite, drusy quartz, sphalerite, pyrite and rare chalcopyrite.