Ch. 3: Precious Gem stones in 1912

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1030                              MINERAL RESOURCES, 1912.
p its. The gems were found in pockets, one of which is reported to ave yielded about 40 pounds. M. D. Kothschild, president of the American Gem & Pearl Co., states that some of the amethysts obtained were very fine.
Rock outcrops are scarce near the mine and the nature of the country rock could not be definitely ascertained. A reddish, some- what sandy, saprolite containing scattered fragments of bluish-opa­lescent quartz and a few small bodies of kaolin were encountered in the pits. The saprolite is suggestive of a granitic rock inclosing peg­matite. On the surface of the ground along the ridge there is a little debris of a pegmatitic rock composed of blue quartz, feldspar, and hornblende, with a little apatite in some specimens. These observa-tions agree with the conditions outlined in the report of Watson and Taber ' on the rutile deposits in the adjoining region, in which the country rock is described as a complex metamorphosed gneiss of igneous origin corresponding to quartz monzonite. This gneiss is intruded by various later igneous rocks, among which is pegmatite consisting essentially of feldspar and blue quartz with hornblende, apatite, and rutile present in many 'places. This rock forms the rutile ore in some of the mines operated for that mineral.
Amherst County.—A rather promising occurrence of amethyst is known on the W. P. Sutton place at Fancy Hill, one-third of a mile north of Sandidges post office and 7 miles N. 33° W. of Amherst, in' Amherst County. The crystals have been found along a ridge at two places, one about 250 yards and another about 100 yards north­east of C. H. Floyd's house. At the first place amethystine quartz crystals have been picked up in some quantity from an old woods road leading off of the ridge to the northwest. At the second place only a few crystals have been found in the same road along the summit of the ridge. No digging has been done at either place, but it is possible that little work would be required to locate the veins. The country rock of the region surrounding the amethyst deposits is a gneiss of granitic composition, intruded by pegmatite and pegmatitic granite with a porphyritic texture. The pegmatitic rocks contain abundant blue opalescent quartz similar to those of the rutile region in Nelson County already mentioned in the description of the Ameri­can Gem & Pearl Co.'s amethyst mine.
The amethyst crystals found range from very pale purple to fairly dark purple. In some specimens the purple inclines to a light reddish violet of very pleasing tint. Segregations or patches of color are common in the crystals, their positions generally being influenced by the crystal structure. The majority of the crystals seen were short stout prisms with one or both ends terminated by the rhombohedral faces. Most of the crystals were less than an inch thick. Colorless quartz crystals occur at other points on the Sutton place.
Charlotte County.—Amethyst is found on the A. W. Donald planta­tion, about 2 J miles north of west of Charlotte Court House, in Char­lotte County. The occurrence of these crystals has been known to members of the Donald family for more than 35 years. Many specimens have been picked up as curiosities, but no use has been made of them as gems. The amethysts have been found rather
1 Watson, T. L., and Taber, Stephen, The Virginia rutile deposits: BuU. U. 8. Geol. Survey No. 430, 1910, pp. 200-213.
Ch. 3: Precious Gem stones in 1912 Page of 93 Ch. 3: Precious Gem stones in 1912
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US Geol. Surv. 1912. Gemstones, Metals.
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