nail. Two of these inclusions, not so large, are in the possession of Rev. W. C. Hovey, of Minneapolis, Minnesota.
In Nevada county, California, in the Grass Valley mines, quartz is often found supporting gold between the crystals. Pellucid crystals of quartz, some 1 inch long and three-fourths of an inch across, filled with a very brilliant stibnite projecting in all directions and some of them curiously bent, were found at the Little Dora mine, Animas forks, San Juan, Colorado, Mr. John W. Palmer, of Chicago, owning a very fine one. This material is capable of being made into one of the finest of this class of gems that have been found at any locality.
The beautiful specimens of limpid milky quartz, and also quartz crystals, the latter at times from three-fourths of an inch to 2 inches long, are found penetrated by crystals of black hornblende varying in size from acicular to those one-sixteenth inch in diameter and at times 6 inches long. They interlace and penetrate the quartz in every direction, making a very beautiful gem and ornamental stone. Fine pieces 6 inches square have been found. It occurs at the quarry at Calumet hill, Cumberland, Rhode Island, where the workmen, as a rule, knowing its value, secure the best specimens for disposal to the greatest advantage. Some hundreds of pounds of this material were sent abroad a few years ago to be cut up for jewelry at Idar and Oberstein. As, however, work has been suspended at the locality, the mineral is likely to become somewhat uncommon. Cut specimens sell at from 50 cents to $5, and specimens polished on one side at from 25 cents to $5. This locality is one of the best known for this association.
Among other inclusions that might be utilized for gems may be mentioned the following : Crystals of quartz filled with specular iron found at the Sterling mine, Antwerp, New York; quartz including scales of hematite from King's Mills, Iredell county, North Carolina; dolomite in pellucid quartz of Herkimer county, New York; crystals of quartz containing crystals of the green spodumene (hiddenite) from Stony Point, North Carolina, and fine inclosures of chlorite and mica, green when viewed through the side of the prism, from several North Carolina localities.
The corals and sponges of Tampa bay, Florida, which are so often found there altered to chalcedony by the sileceous waters, are at times filled with fluid that was imprisoned while the regular deposition of silica closed the apertures that admitted the siliceous water. These, as well as the ones found in Uruguay, the so-called hydrolites, or water-stones, are always lined with drusy quartz. If not as beautiful as those from Uruguay, they are even more interesting, and have been sold at from $2 to $20 each.
, The crystals of quartz from the Herkimer (New York), North Carolina, and Arkansas loealities, containing fluid cavities with moving bubbles, are at times cut into ornaments which are not only interesting but pretty. One of these pure limpid crystals with a crescent-shaped
