p. 123

133.

Quartz is very common. Fine specimens are occasionally found on the shores of the lakes and rivers. In the "Mineral Country" it occurs in geodes and in mammilary form; it is here called "lead blossom" and is one of the indications of the existence of lead ore. Several of the numerous varieties have been noticed; as Milky Quartz, on the pine ridges of the Upper Mississippi: RadiatedQuartz on Lake Pepin; Granular Quartz at the Falls of Pickagama; Ferruginous Quartz at Sandy Lake and on the dry pine ridges in that vicinity; Hornstone or Chirt is very abundant at the Blue Mounds and other places in the lead mine region; Calcedony on the shore of Lake Superior, on the Mississippi &c. &c. Carnelian is found among the pebbles on the margin of Lakes and rivers- very abundant about Lake Pepin, &c.; Jasper is usually found with cornelian; also Agate, and agatized wood on the Mississippi.