These vintage Navajo Indian silver and turquoise dimensional decorative stamp work butterfly screwback earrings measures approximately 15/16" (2.4 cm) by 7/8" (2.2 cm) and together weigh 6 grams. I have left on the original patina. Like most older Native American jewelry, these are not stamped or hallmarked for silver content. They are sterling or a slightly lower grade of silver.The item "VINTAGE NAVAJO INDIAN SILVER TURQUOISE DIMENSIONAL BUTTERFLY SCREWBACK EARRINGS" is in sale since Monday, March 3, 2014. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Vintage Ethnic/Regional/Tribal\Native American (pre-1935)". The seller is "deja--voodoo" and is located in Santa Cruz, California. This item can be shipped worldwide.