Wikipedia has an article on: Chert Wikipedia From spicular + -ite. <span class="searchmatch">spicularite</span> (uncountable) (geology) Chert composed of spicules of glass sponges and...
From <span class="searchmatch">spicularite</span> + -ic. spicularitic (not comparable) (geology) Of or pertaining to <span class="searchmatch">spicularite</span>....