shalelike

shalelike

(ˈʃeɪlˌlaɪk)
adj
having the properties or appearance of shale
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Now they resembled those kinds of shalelike stones that acquire a vivid, greenish color when you immerse them in water.