druse

(redirected from Drusy)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

druse

(drōōz)
n. pl. dru·sen (drōō′zən)
One of the small hyaline or colloid bodies sometimes occurring behind the retina of the eye.
Mentioned in ?
References in periodicals archive ?
In the central part of the quarry, outside the main mineralized zone, some cavities are lined by colorless or bluish drusy quartz with individual crystals reaching about 1 cm.
The clusters, to 30 cm across, show the former tabular barite crystals (to 4 cm) in ghostly terms of shapes now encrusted by glittering drusy quartz.
4 mm) are relatively uncommon and are found on drusy quartz or lining fractures in marble.
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.
However, the names Frizington, Egremont and Cleator Moor immediately conjure images of fabulous, classic barite, calcite and fluorite crystal clusters, mammillated to reniform hematite "kidney ore" specimens, and beautiful, lustrous, colorless to smoky quartz crystals of a stout habit on sparkling drusy hematite.
Here a more complex mineralogy, affected by an intense process of dissolution and recrystallization, includes microcline, albite, albitized microcline, altered hydrous micas, and sometimes small pockets lined with drusy quartz.
Nearly all datolite specimens are found as drusy plates of whitish to pale green crystals up to 1.
The fluorite only appeared later, in about 2004, and then was not really appreciated until the drusy quartz coatings on the fluorite crystals were chemically removed.
In matrix pieces ranging between 5 and 25 cm across, bright lime-green and yellow-orange hemispheres of curved, tightly intergrown crystals (the "campylite" habit) reaching 1 cm in diameter rest on seams in quartzite, or are implanted on drusy quartz in vugs.
The blocky crystals often have a drusy coating of pyrite, and commonly appear to be parasitic growths on polybasite.