Bonhams 1793 : A colored diamond and diamond ring, Takashi Wada

of openwork design, the off-center light brown round brilliant-cut diamond within an oval border of round brilliant-cut diamonds; with maker's mark; central diamond weighing approximately: 3.00 carats; remaining diamonds weighing approximately: 1.40 carats; mounted in eighteen karat gold; size 6 1/2 (colored diamond not tested for origin of color)

Sold for US$ 8,540 inc. premium