sagenite

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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.

Classic agate deposits: of Northern Mexico

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.

Tucson Show 2005

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).