A rainbow of coloured gemstones along with rare signed jewellery pieces are to be offered at Bonhams forthcoming jewellery sale this November.

In its last sale of the year, Bonhams Rare Jewels and Jadeite sale is set to feature more than 160 lots estimated in excess of HK$100 million.

The rainbow of coloured stones up for auction include:

· Red: a 4.02 carats cushion-shaped ruby and diamond dress ring (estimated at HK$1,350,000 - 1,800,000).

· Orange / yellow: a pair of floral earrings set with cushion-shaped, fancy vivid yellow orange and yellowish orange diamonds (estimated at HK$2,800,000 - 3,800,000).

· Green: a 14.93 carats cornered step-cut, Colombian emerald and diamond ring (estimated at HK$3,000,000 - 4,000,000). In addition, the auction house will also offer a fine translucent carved jadeite ‘Guanyin’ of a rich bright green colour, meditating on a lotus throne, embellished by marquise, pear and brilliant-cut diamonds (estimated at HK$2,700,000 - 3,500,000).

· Blue: a 6.50 carat square step-cut Kashmir sapphire and diamond ring (estimated at HK$5,800,000 - 7,000,000). The auction house is also offering a 26.43 carats sapphire and diamond ring (estimated at HK$4,800,000-5,800,000).

· Purple/pink: a 9.21 carats pear-shaped fancy light purplish pink, Internally Flawless, Type IIA, diamond pendant (estimated at HK$12,000,000 - 15,000,000) and a rare oval-cut fancy vivid purplish pink, VVS1 clarity, diamond ring (estimated at HK$4,500,000 - 7,000,000).

Jewellery collectors will also be delighted to find a rare and impressive enamel, emerald and diamond ‘Serpenti’ bracelet watch by Bulgari, circa 1970 among the highlights. It is believed that Bulgari produced less than 100 of the iconic ‘Serpenti’ bracelet watches between 1960 and 1970. The late Hollywood actress Elizabeth Taylor – who was known for her love of fine jewellery - played an important role in propelling the Bulgari snake bracelet into the spotlight when she was photographed wearing one on the set of Cleopatra in 1962.

Graeme Thompson, the director of jewellery for Bonhams Asia, said, “Without a doubt we are seeing the continued demand for coloured stones, in particular emeralds, sapphires and rubies. Our forthcoming sale has exceptional examples of all these stones and we are expecting interest and bidding from around the globe. ”

“The appeal of coloured diamonds also remains strong and we are delighted to offer lots including the fancy vivid yellowish orange diamond and diamond earrings. Often referred to as `pumpkin' diamonds, vivid orange and vivid yellowish orange diamonds are exceptionally rare and we believe this may be the first time that a pair of orange diamonds of this type is to be offered at auction.”

”Signed vintage pieces by the important houses like Van Cleef & Arpels, Cartier, Bulgari, Harry Winston and Marina B continue to capture jewellery lovers and collectors’ interest given they represent the best of what was produced in their respective decade. The craftsmanship which goes into these pieces is phenomenal and buyers are recognising and appreciating this not only in Asia but also worldwide.”

The auction will preview on 28-30 November at Bonhams Hong Kong Gallery. For further information, please visit https://www.bonhams.com/auctions/22894/. Bids can be placed online on Bonhams website www.bonhams.com, via telephone, in writing, and also in person on the day of the sale.

Following the sale at Bonhams Hong Kong, Bonhams London will hold its Fine Jewellery sale on Saturday 5 December and at Bonhams New York on 8 December 2015.