Silver & Shakudo spotted heart.
 
Sterling silver and  Shakudō, an exquisite metal alloy with a distinct reddish-black hue, holds a rich history that stretches back centuries in Japan. Its origins can be traced to the Edo period (1603-1868) when it emerged as a favored material in traditional Japanese crafts and decorative arts.
 
Shakudō, an exquisite metal alloy with a distinct reddish-black hue, holds a rich history that stretches back centuries in Japan. Its origins can be traced to the Edo period (1603-1868) when it emerged as a favored material in traditional Japanese crafts and decorative arts.  In terms of composition, Shakudō consists of approximately 4% to 10% gold and 90% to 96% copper.