LEACH & GARNER AGREES TO ALTER GOLD ADS Leach and Garner International, Providence, R.I., has agreed to more clearly state quality claims about its new Leach & Garner Gold made in print ads and during television shopping programs. The action follows complaints to the Better Business Bureau by two competitors. The competitors - Dalow Industries, Long Island City, N.Y., and OroAmerica, Burbank, Cal. - cited print ads that tout the superiority of 14k Leach & Garner Gold regarding hardness, color, durability and shine. They also questioned more specific claims that president Ted Leach made about the company's Eterna Gold during a QVC television shopping network broadcast. The National Advertising Division of the Council of Better Business Bureaus, New York, N.Y., investigated and said it could not substantiate Leach and Garner's claims. NAD recommended that Leach & Garn