UNITED STATES, CANADA AND MEXICO	193
	The rutile crystals are in nearly all cases imbedded in a compact red oxide of iron that can be readily removed by hydrochloric acid, or by means of some sharp instrument, leav­ing on the surfaces a mirror-like polish. The crystals vary in length from 1/2 an inch up to 5 inches, and are in single crystals, twins, and vierlings, often in fine groups. The rutile from this locality has realized at least $20,000 for cabinet specimens, and has supplied the collections of the world through the perse­verance of Prof. Charles U. Shepard. The finest small brilliant geniculated crystals are found at Millholland's Mills, White Plains, near Liberty Church, and near Popular Springs, in Alex­ander County, N. C. These have furnished some of the finest cut black rutile, more closely approaching the black diamond in appearance than any other gem. Some of the lighter colored ones furnish gems strongly resembling common garnet. Beauti­ful long crystals, at times transparent red, ranging from the thickness of a hair to 1/4 and in some instances f inch across, and from 1 inch to 6 inches in length, often doubly terminated and very brilliant, have been found at Taylorsville, Stony Point and vicinity, North Carolina. Fine crystals are also found in quartz as well as loose in the soil in Sadsbury Township, Pa., for seven miles along the valley, especially near Parkesburgh, where double geniculations forming complete circles have been found, some weighing over a pound each. This is the "money stone" of the inhabitants of the district, who search for it because they can obtain money for it from the collectors ; hence the name. Some of the finer stones, as well as the beau­tiful geniculated nigrine from Magnet Cove, would well serve as natural ornaments. As early as 1836, the rutile of Middle-town, Conn., was cut by Prof. Charles U. Shepard into gems that were almost ruby-red in color. On St. Peter's Dome, in the Pike's Peak region, jet-black rutile occurs as black tetrag­onal crystals about £ inch (10 millimeters) long. Octahedrite is reported as occurring in small crystals at Dexter's lime rock, Smithfield, R. I., and in flat, tabular, glassy crystals of a pale-green color and very brilliant, in the gold sands of Brindletown Creek and elsewhere in Burke and the adjoining counties of North Carolina. These would probably