Min. [‘Kaschtschilon = “beautiful stone.” of Kalmucks and Tartars’ (Dana).] A variety of the opal, opaque, bluish-white, porcelain-white, pale yellowish or reddish.
1791. Macie, in Phil. Trans., LXXXI. 369. That variety of calcedony which is known to mineralogists by the name of Cacholong.
1868–80. Dana, Min., 199. Cacholong … often adheres to the tongue, and contains a little alumina.
