Fancy Deep Brownish Greenish Yellow Diamond, Conch Pearl

Of floral design, centring upon a cut-cornered square modified brilliant-cut fancy deep brownish greenish yellow diamond weighing 0.93 carat, surrounded by stamens set with diamonds of yellow tint, to the conch pearl petals framed by coloured sapphires, rubies and diamonds, completed by the diamond-set stem and pear-shaped emerald leaves, mounted in 18 karat white, yellow and pink gold, signed MY, with Michael Youssoufian maker’s mark, pouch stamped M.Y.

Here’s how you can value a conch pearl