A 6.03-carat cushion-shaped, fancy, vivid blue, internally flawless type IIb diamond is among the auction highlights and is expected to sell for more than $AUD16 million.
“Most blue diamonds contain boron and little to no nitrogen; they display an irregular crystal lattice and can sometimes occur in large sizes,” a description of the diamond explained.
“These features suggest formation under different geologic conditions compared to the majority of colourless diamonds. Blue diamonds can also contain mineral inclusions which allow geologists to deduce information on the depth and host rock during the diamond’s formation.
“The minerals encountered within these inclusions are only found together in environments exposed to high pressure, extremely deep inside the Earth’s mantle.”
The auction will also include pieces from Van Cleef & Arpels, Bucherer, and Cartier, alongside fancy colour diamonds and colour gemstones.
Additional highlights include an 18.38-carat pair of D-flawless diamonds, a 102.40-carat Ceylon sapphire known as The Peacock of Ceylon, and a circa-1950 Cartier bracelet featuring a 7.04-carat Kashmir sapphire.
More reading
Legendary collection of Cartier watches heads to auction
Historic Tudor Pendant to stay in public collection
Royal Blue: Massive return for stunning sapphire necklace
Record price for pocket watch as Titanic legend lives on
Elusive Patek Philippe expected to command millions at auction
 | 2026 JEWELLERS' SUPPLIERS DIRECTORY
Find Anything & Everything Click for the Full Index to discover fresh products, trends, and suppliers.
If it’s not listed here, it’s not worth knowing about! The annual Suppliers Directory is the #1 directory for retailers looking for new products and new suppliers. If you don’t know, we do!
|