A remarkable 32.20 carat Fancy Intense Yellow diamond is expected to headline Bonhams’ Exceptional Jewels auction in New York on 8 June, carrying a pre-sale estimate of US$350,000 to US$550,000.
The auction, which will be held at Bonhams’ newly opened headquarters in Steinway Hall at 111 West 57th Street, will feature an impressive selection of coloured diamonds, exceptional white diamonds, rare coloured gemstones and signed jewellery from some of the world’s most prestigious maisons.
The leading lot is an 18 carat white gold ring centred on a cushion-shaped 32.20 carat Fancy Intense Yellow diamond graded VS2 clarity. The diamond is surrounded by pavé-set round brilliant cut diamonds and originates from the collection of noted philanthropist Glorya Kaufman, whose contributions to the arts included the establishment of the USC Glorya Kaufman School of Dance.
Among the most significant white diamond offerings is a platinum ring featuring an 11.20 carat emerald cut diamond graded E colour and VS1 clarity. The stone carries an estimate of US$250,000 to US$350,000 and comes from the collection of luxury retail pioneer Linda Dresner.
Bonhams will also present an important platinum ring by Harry Winston showcasing a 7.08 carat cushion cut Colombian emerald flanked by tapered baguette cut diamonds. The emerald ring is expected to realise between US$250,000 and US$350,000.
Further highlighting the auction’s strong coloured diamond offering is an 8.23 carat cushion-shaped faint pink diamond ring. The internally flawless diamond is mounted in 18 carat white and pink gold and accented with trapezoid-shaped and round brilliant cut pink and white diamonds. It carries an estimate of US$180,000 to US$280,000.
Exceptional Coloured Gemstones Feature Prominently
Bonhams has placed particular emphasis on rare coloured gemstones, led by a striking necklace centred on a 5.02 carat unheated Burmese ruby. The oval-shaped ruby is surrounded by alternating baguette and round brilliant cut diamonds and suspended from a graduated diamond necklace containing approximately 39 carats of diamonds. The piece is estimated at US$100,000 to US$150,000.
Among the standout gemstone lots from the Glorya Kaufman collection is a necklace featuring a 30.61 carat oval-shaped Paraíba-type tourmaline from Mozambique. Mounted in a distinctive 14 carat gold hexagonal frame and suspended from a gold link chain, the necklace is expected to achieve between US$150,000 and US$250,000.
Another notable offering is an impressive platinum necklace by J.E. Caldwell set with step-cut multicoloured sapphires and a central zircon, accented by marquise and round brilliant cut diamonds. Accompanying AGL reports identify the four principal sapphires as originating from Sri Lanka, with three displaying no evidence of heat treatment. The necklace contains an estimated 100 to 120 carats of sapphires and is valued at US$150,000 to US$250,000.
Completing the coloured gemstone highlights is a Bulgari necklace estimated at US$125,000 to US$225,000. The design features oval-shaped multicoloured sapphires separated by pairs of round brilliant cut diamonds and suspends a detachable pendant centred on a 24.10 carat pear-shaped yellow sapphire of Sri Lankan origin.
The sale demonstrates continued strength in the market for important coloured diamonds, unheated gemstones and signed high jewellery, with collectors showing increasing interest in rare stones accompanied by notable provenance and prestigious brand associations.
Source: DCLA
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