GoldCompany keeps a close eye on the global market — and one of the year’s most anticipated events is the upcoming Sotheby’s High Jewellery Auction in New York on 13 June. This prestigious sale will offer 110 breathtaking lots, from rare colourless and fancy coloured diamonds to heirloom pieces from some of America’s most prominent families.
Whether you’re a collector, investor, or simply a lover of exceptional jewellery, this auction offers insight into the current demand for premium diamonds — and what buyers are willing to pay for rarity, craftsmanship, and provenance.
The Star of the Show: 35ct Graff Diamond Ring
The top lot is a show-stopping 35.01-carat emerald-cut diamond ring by Graff, boasting D colour and VVS2 clarity. Estimated at USD $2 million to $3 million (approximately AUD $3 million to $4.5 million), it’s a textbook example of how large, high-clarity diamonds continue to command strong premiums.
This exceptional gem is one of 13 jewels from a private collection titled Joie de Vivre: Journey in Jewels — each piece a romantic gift from a husband to his wife over more than six decades.
Other Highlights: Fancy Colours, Emeralds and Collectible Jewels
Also from the Graff collection:
- Emerald and Diamond Earclips – With four sugarloaf emeralds totalling around 84 carats, this pair is estimated at USD $800,000 – $1.5 million.
- Aquamarine & Diamond Bracelet – USD $40,000 – $60,000.
- Jade & Diamond Brooch/Pendant – Circa 1910s, estimated at USD $25,000 – $35,000.
These are more than beautiful jewels — they represent how sentimental value and fine materials combine to increase market appeal.
Fancy Pink and Blue Diamonds Continue to Shine
Fancy coloured diamonds are a key focus:
- 5.02ct Fancy Pink Diamond Ring (VS2) – USD $1.5 million – $2.5 million.
- 2.02ct Fancy Vivid Blue Diamond Ring – USD $1.4 million – $1.8 million.
These coloured stones are among the strongest-performing segments of the diamond market, making them increasingly desirable as alternative assets.
Historic Heirlooms from the Vanderbilt and Wade Families
Jewels with documented provenance are another standout theme. A ruby and diamond sautoir by Marcus & Co. is estimated between USD $1 million and $2 million. Featuring a 9.60ct unheated Burmese ruby and old European-cut diamonds, the piece once belonged to Emily Vanderbilt Wade, descendant of two of America’s most influential families.
Other historic highlights:
- Cartier Art Deco Diamond Bracelet – USD $60,000 – $80,000.
- Rene Lalique Art Nouveau Pendant – Gold, enamel, emerald, and pearl, circa 1900; estimated at USD $20,000 – $30,000.
- Tassel Sautoir Necklace – With rubies, emeralds, pearls, and diamonds, possibly by famed Tiffany designer Paulding Farnham; estimated at USD $40,000 – $60,000.
What This Means for Australian Gold and Diamond Sellers
At GoldCompany, we help our clients understand how high-end sales like Sotheby’s reflect broader market trends. Rising demand for certified stones, coloured diamonds, and historic pieces reinforces the value of holding — or selling — premium jewellery at the right time.
If you have diamond rings, coloured stones, vintage pieces, or high-carat gold jewellery, our team in Sydney can assess your items and offer top prices, on the spot. Whether it’s a family heirloom or a forgotten treasure in your jewellery box, it could be worth more than you think.
Thinking of selling your jewellery or diamonds?
Contact GoldCompany today or visit us for a free valuation — no appointment needed.
