Ruby and diamond 'Iris' brooch, Aletto Brothers. photo courtesy Sotheby's

Designed as an iris, the flower bud and leaves concealingly-set with calibré-cut rubies, decorated by pavé-set brilliant-cut diamonds and a channel-set tapered baguette diamond stem, the rubies and diamonds together weighing approximately 60.00 and 10.70 carats respectively, mounted in platinum and 18 karat yellow gold, signed and numbered 120508. Estimate 350,000—420,000 HKD. Lot Sold 375,000 HKD

Accompanied by a signed box.

Rock Crystal and diamond bracelet, Aletto Brothers. photo courtesy Sotheby's

Composed of circular facetted rock crystal links, each decorated by a ring of brilliant-cut diamonds, the diamonds together weighing approximately 3.50 carats, mounted in 18 karat white gold, length approximately 170mm, signed and numbered 162810. Estimate 140,000—180,000 HKD. Lot Sold  237,500 HKD

Sotheby's. Magnificent Jewels & Jadeite, 06 Oct 10, Hong Kong www.sothebys.com