spathic

spath·ic

 (spăth′ĭk)
adj.
Having good cleavage. Used of minerals.

[German Spah, Spath, spar (from Middle High German spāt) + -ic.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

spathic

(ˈspæθɪk) or

spathose

adj
(Minerals) (of minerals) resembling spar, esp in having good cleavage
[C18: from German Spat, Spath spar3; related to Old High German spān chip; see spoon]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Translations
References in periodicals archive ?
The lithologic character of Shanxi Formation is mainly feldspar debris quartz sandstone, followed by a few of field spathic lithic sandstone and lithic sandstone.
A wide variety of other types have also been found, including specimens with (1) spongy grey matrix, (2) brecciated matrix, (3) spongy matrix composed of fine to medium-grained green crystals of garnet, (4) spongy matrix composed of partially altered fossiliferous sandstone, (5) massive matrix composed of fine-grained aggregates of garnet and calcite, crosscut by coarse-grained veins of spathic calcite, and so on.