At last week's auction at C. G. Sloan & Co, two Iranian rug dealers bought several pieces of antique Persian silver and gold artifacts to be shipped back to Iran.

Donald Webster, president of Sloan's said that a two-handle vase brought $4,250 and the other pieces sold for $900 to $2,600. All the antiquities came from an East Coast museum. The sale amounted to $1,318,563, plus buyer's surcharges of 10 percent. A number of European buyers attended the sale, looking for bargains in the exchange rate. One German desk sold for $10,000 and will go back to Germany.

Many of the expensive pieces sold were from the estate of Margaret Garber Blue, daughter of Washington's prominent dealer. A floral still life by Dutch painter Rachel Ruysch (1664-1750) brought $23,000. The still life hung over Blue's mantelpiece in her Ontario apartment for years. A pair of paintings of the U.S.S. Constitution by Thomasso DiSimone brought $16,000.

A ikon of the Virgin and Child made by a Faberge artist called Orchinnikov sold for $8,000. It once hung in the Russian Imperial winter palace. A Christ ikon brought $6,500.

Webster noted the absence of the usual brisk bidding for the big expensive Persian rugs by dealers. And three big pieces of diamond jewelry, two necklaces and a ring did not sell.

Adam A. Weschler & Son is holding a three-day catalogue auction ending today. Indian artifacts, rugs and baskets of the late 19th century are unusual items. A Navajo serape-style blanket is expected to bring $3,000 to $5,000. An Apache round coiled basket is estimated at $1,500 to $2,500.

The sale includes a number of oriental rugs, including an antique silk Heriz rug, 8 feet by 6-feet-3-inches, which is expected to bring $15,000 to $20,000.

American paintings by William Glackens, George Luks, John Singer Sargent and Robert Henri are expected to bring high prices. CAPTION: Pictures 1 and 2, A pair of Russian icons sold at auction for $8,000 and $6,500.