a. (UN-1 7 b)
1825. Haidinger, trans. Mohs’ Min., III. 86. It [chloropal] has been found accompanying uncleavable Quartz near Unghwar, in the county of the same name in Hungary, and is often called Green Iron-Earth.
1839. Ure, Dict. Arts, etc., 744. Opal, or uncleavable quartz.
1855. Orr’s Circ. Sci., Geol., etc., 514. Uncleavable Staphyline Malachite.
