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excellent materials for grindstones, but up to the present they have only been utilized for local use.

WHETSTONES.

No whetstones have yet been manufactured in Texas, although excellent material exists for such a purpose. The Fayette Sands probably furnish the best of the material, and some specimens from Fayette County are now in the Museum. Other material suitable for the purpose is found in the Central Mineral Region and in the Central Coal Field.

INFUSORIAL EARTH.

Several localities of deposits of this material are known in Hopkins, Leon, Polk, and Crosby counties. Very little has been mined for shipment.

ORNAMENTAL STONES AND GEMS.

Among the gem stones may be mentioned Beryl, Smoky Quartz, Rose Quartz, Silicified Wood, Garnet, Agate, Moss Agate, Amethyst, Jasper, Sardonyx, Tourmaline, and others.

QUARTZ.

The clear white variety, which is known as "crystal," is sparingly found in masses of a size suitable for use. Clusters of crystals are found which form handsome ornaments, but the greater part are stained or milky.

SMOKY QUARTZ.—The Central Mineral Region produces fine crystals of smoky quartz of deep color. Barringer Hill, Llano County, is one of the best localities.

ROSE QUARTZ.—Beautiful shades of rose quartz are found in Llano and Gillespie counties.

AMETHYST.—Gillespie County furnishes some amethysts of fair color, but the deeper colored ones have so far been found only in the Sierra Blanca or Quitman region.

THETIS HAIR STONE.—This variety of limpid quartz with fine needles of actinolite scattered through it is found in the northern part of Gillespie County, near Enchanted Rock.

BERYL.—Some very large fine crystals of beryl have been found in Gillespie County, and occasionally in Llano County.