ZUNI EFFIE CALAVAZA, NATIVE AMERICAN SILVER CORAL TURQUOISE BELT BUCKLE: Sand cast silver belt buckle in snake and stone motif. Large nuggets of red coral and turquoise entwined with snakes with matching stone eyes. Signed verso Effie C. Zuni, Barton Wright's ''Hallmarks of the Southwest'' gives the following information - ''CALAVAZA, EFFIE (Zuni) SILVERSMITH/LAPIDARIST: specializes in sandcasting and incorporates large stones. Snake designs. She began producing in 1956 after learning the craft from her husband. She uses both her husband's and her own designs. HALLMARK: Stamped hallmark of her husband's or her given name with Zuni underneath in 1/16 Gothic print. The mark EFFIE C. is used as a family mark by Effie and three daughters. She shared her spouse's mark until his death ca. 1970. Spouse was Juan Calavaza. Daughters are Georgiana Yatsattie, Gloria Jean Garcia, and Susie Calavaza. Note: Jewelry is indistinguishable.'' 3 1/2'' x 2 1/4''