sagenite


Also found in: Dictionary.

sagenite

[′saj·ə‚nīt]
(mineralogy)
A variety of rutile that is acicular and occurs in reticulated twin groups of crystals crossing at 60°.
References in periodicals archive ?
There are zig-zags and scallops, bouquets, sagenites (acicular sprays), sunbursts, and eyes.
non-emerald, specimens are groups of sharp, lustrous, translucent grayish or brownish white rhombohedral crystals of dolomite (perhaps grading to ankerite as Fe increases), with individuals to 4 cm on edge, the groups reaching large-cabinet size; associated with the carbonate crystals are thin, sharp muscovite plates to 3 cm (some standing up edgewise), rutile as lustrous 2-cm prisms and nests of "sagenite" needles, colorless quartz crystals, and, oddly, lustrous arsenopyrite crystals to 2 cm.
In 1994, in the footwall of the talc structure, a few isolated, red crystals of the "sagenite" type of rutile (to 1 mm) were found with calcite in the chloritization zone (Favreau, 1994).