This wave-shaped bracelet was made in New York in the 1980's by Angela Cummings for Tiffany & Co. It features a geometric pattern crafted in 18k yellow gold, inlaid with red jasper.
Jasper is an opaque and fine-crystalline variety of quartz. Its colours range from yellow through red and reddish-brown to green. Jasper has been worked as a gemstone since ancient times. People made seals and small carved stones from it, for instance. Jasper was attributed magical powers. In ancient times it was called the mother of all stones.