The Coconino sun., 1917-02-23
GEMS AND PRECIOUS
 STONES OF ARIZONA

which has been issued by the UnlVer sity of Arizona, from which bulletin the following extracts are taken:
 The best known gems found in Ari. zona are the turquoise, garnet, perid' ot, chrysocolla, azyr-malachite, mala- chite, agate, chalcedony, amethystine quartz, diamond (meteoric) diptose and topaz.
 Most of the gems and precious stones found in Arizona are merely by-products of the mining of other substances, and are sorted out from poorer specimens. The turquoise, gar net and peridot are mined separately There are several companies that have produced turquoise in Arizona. The garnets are gathered fro mthe sand and gravel beds in which they are most commonly found.
 In preparing precious stones for market, the best specimens are first selected, cleaned, cut in various shapes, and polished. Poorer speci- mems are also cut and polished, or they may be reserved for use in pri- vate and public collections.
 Wholesale prices of gems-Turqu- oise is worth up to $10O a pound at the mine, in the rough, but usually is less valuable. Matrix material brings from $5 to $25 per pound. Cut matrix turquoise costs from ten cents to ten dollars carat. Cut clear blue tur- quoise costs from $1 to $10 carat, the price increasing with size. When cut in large quantities, stones may be cut for three to five cents a carat.
 Garnet is sold in the rough as single stones, and brings a price rather less than one fifth the price of cut stones. Cut pyropene garnets are worth from 50 cents to $2 carat, depending on the quality. Almandine garnets, if re- sembling the emarald, cost SIP to $15 a carat. The cost of cutting is $1 to $50 per carat.
 Peridot is also sold as separate stones. Cut material runs from $2 to $15 carat. $5 usually buys a good stone. Cutting costs from S1 to $1.50 a carat.
 Copper bearing stones, excluding high grade malachite, sell for about $10 a pound. When cut, they are sold by the stone rather than by carat, and are sold so as to make profit. No definite price can be set. They cost from five cents to ten cents a carat for cutting.
 Chalcedony, unless of the turtle back variety, is hardly worth s1 per pound. Cut material is barely worth $1 per pound. Cut material is hardly worth the cost of cutting, which is 5 to 10 cents a carat. Turtle back variety bring $5 or more for stone.
 Amethystine quartz is almost value less, except as mineral specimens un- less it holds color. The cut Amer ican material is hardly worth more than the cost of cutting. But foreign material may be worth $4 carat when cut. The cost of cutting is from 50 cents to $1 a carat.
 Topaz is bought by the single stone. Fine gem crystals, when colored, may be worth $50 to $100. Cut material, in dark blue shades, brings $10 to $25 a carat; the fine golden yellow bring S4 a carat; diamond cut white stones bring $1 to $2 a carat. The cost of cutting is about $1 carat.
 In Arizona the turquoise and garnet are sure of wide market, at almost all times. Gems of the copper group, azurite, malachite, dioptase, etc, will find a mraket, not always steady, but fairly so, especially with curio seek CTS.
 Although there is, as has been seen, quite wide variety of gems and pre- cious stones in Arizona, one could hardly say that prospects of any great or continued production are good. What production there is will prob- able always be on a small scale.