Vintage / antique Art Nouveau Yin Yang handmade necklace

Very old vintage / antique Art Nouveau Yin Yang pendant. Possibly made of sterling silver, but not stamped. Back then, tamping precious metals wasn't mandatory in every country. I used a similar color connecting ring as a bail and added vintage chain that matched this pendant best. The Yin Yang symbol is made of what looks like a glazed glass. 1.1" long pendant (with bail) 18" long chain. There is a very small imperfection near the white dot, shown under strong magnification in the last picture. Otherwise in very good condition.