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1040
MINERAL RESOURCES.
be more like jasper. In places the chalcedony grades into crystallized quartz. The material occurs in masses and aggregations of spheru­lites with mammillary and botryoidal structures. The spherulites range from minute size to over a centimeter in diameter and show a beautiful concentric agate banding of thin gray, white, and red layers. A radiated texture may or may not be visible and in some spherulites tiny radial quartz crystals occur in the center or in la}Ters. A few of the spherulites exhibit very little internal structure or merely have spots of red near the center surrounded by gray chal­cedony with even texture. In some specimens the spherulites are large or a number have been cemented together by chalcedony so that stones of sufficient size for cutting are obtained. Some of the gems are said to give the effect of thomsonite with deep jasper-red tints in gray matrix. As small fancy agates some of the larger spherulites would be very effective.
In some specimens spherulites of various sizes are thickly distrib­uted through granular crystallized calcite. Many of the spherulites are isolated but some are bunched in botryoidal masses as shown when the calcite gangue is dissolved by acid. One specimen is described as resembling the cast of an ammonite shell. It was not
p ossible to determine the nature of this from the sample submitted. It consisted of many spherulites cemented together with chalcedony with cavities lined with small crystals of quartz and calcite. The sample examined evidently came from a disklike specimen about 2 inches thick.
OREGON.
Chalcedony, agate, and jasper-like agate have been found near Rogue River and Eagle Point, and for some distance along Rogue River valley. The chalcedony is translucent and gray with a slight agate banding, and is found in streaks and nodules in the basalt near Ashland. Some of it contains cavities lined with quartz crystals. The agate is varicolored, ranging from banded translucent gray to mottled red and yellow, and some of it contains so much iron oxide as to resemble jasper. Two specimens labeled "red moss jasper" consist of opaque and translucent chalcedony crowded full with dark-red, reddish-yellow, and yellow mosslike markings of jasper. In other specimens of moss agate there are black to dark-brown spots and dendrites. One specimen found near the town of Klamath Falls consists of rather cloudy red chalcedony or agate, inclosing streaks and spots of gray and white chalcedony.
AMETHYST.
NORTH CAROLINA.
The occurrence of amethyst at several places in the vicinity of Raleigh, N. C, has been reported at different times by L. A. Fort, of that city. An opportunity was given to the writer to examine one of these deposits on the land of George W. Partin, 5 miles northeast of Raleigh. Here amethystine quartz and pale amethyst crystals are found on the surface of a cultivated upland field. Three or four small prospect pits, now filled up, had been made a few years ago. The deepest of these pits was about 9 feet, at which depth the rock was less decomposed than near the surface and hard to excavate.