- Valentin Yotkov seeks to revive the ancient techniques of chasing and repousse on jewelry and hollowware made in silver, copper and gold. Born and trained in Bulgaria, currently he lives and works in the United States. Recognized by the American Government as being one of the premier designer silversmiths, and foremost experts in the art of chasing and repousse. His work has been widely ...www.valentinyotkov.com