Clever stamps like this one don't just imprint the clay; they push into the clay and also push clay out, to form a negative and positive design. This site shows many.
Necklace | Tom McCarthy. Sterling, River Rock, Nickel Silver
Black Wire Wrapped Stone Earrings, River Stones- Zen Garden. $25.00, via Etsy.
Cuff | AddictionToDetail Designs. Brass/Nugold.
Ethiopia | Amulet necklace; leather brass and textile. Each of the leather pouches contains a small paper with prayers | Amhara, ca. 1971
circa 1870 - Antique Silver Sewing Etui
Vivianna Torun ring