A 4.08 carat Fancy Blue marquise-cut diamond mounted as a ring. Estimate CHF 725’000 -  1’270’000 / US$ 800’000 – 1’400’000

A 4.08 carat Fancy Blue marquise-cut diamond mounted as a ring. Estimate CHF 725’000 - 1’270’000 / US$ 800’000 – 1’400’000