These vintage Navajo Indian petrified wood silver screw back earrings measure approximately 1/2" (1.3 cm) by 3/4" (1.9 cm), and together weigh 6.3 grams. 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 & PETRIFIED WOOD SCREWBACK EARRINGS" is in sale since Wednesday, January 18, 2017. 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.