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Markets EdgeMACALLAN 1926May 18, 20262 min readAd-free
Christie's Geneva Closes $17M 'Ocean Dream' Sale, Largest Vivid Blue-Green Diamond on Record
The 5.5-carat triangular stone marks the first major colored-diamond exit since Q4 2024's pricing reset.
Markets Edge deskMarkets Edge · Huang GoodmanSource: AP News ↗
In plain words
First colored-diamond comp since Q4 reset prices the vivid blue-green segment at **$3.1M per carat**, below 2015 highs but within institutional bounds.
$17 million
) in its spring jewelry session
$3.1 million per carat
a figure that sits below the
$4.2 million per carat
benchmark set by the Blue Moon of Josephine in…
$1.8 million per carat
average for sub-10-carat vivid blues in 2023
Christie's Geneva moved a 5.5-carat triangular-cut diamond for CHF 13.5 million ($17 million) in its spring jewelry session, a clean execution at the upper end of whispered estimates. The stone, marketed as the 'Ocean Dream,' is the largest fancy vivid blue-green diamond with documented provenance in the trade. The hammer price translates to roughly $3.1 million per carat, a figure that sits below the $4.2 million per carat benchmark set by the Blue Moon of Josephine in 2015 but well above the $1.8 million per carat average for sub-10-carat vivid blues in 2023. The buyer has not been disclosed.
The sale represents the first meaningful price discovery in the colored-diamond segment since November 2024, when Sotheby's Hong Kong withdrew a 12-carat pink ahead of auction after failing to secure floor bids. Geneva remains the preferred venue for stones above $10 million: liquidity is deeper, settlement is cleaner, and the buyer pool includes three Gulf family offices that do not attend New York or Hong Kong sessions. Christie's has handled 68% of all blue-diamond sales above $5 million since 2018, a function of longstanding relationships with De Beers sight-holders and a willingness to underwrite reserves when Sotheby's will not.
The pricing matters because it confirms a compression in the ultra-high-net-worth appetite for hard assets that do not generate yield. Colored diamonds peaked in 2022, when a 15.81-carat pink sold for $57.7 million in Geneva. Since then, allocators have rotated toward credit instruments and direct lending, where dry powder can earn 9-11% with minimal headline risk. The 'Ocean Dream' result suggests the floor has stabilized near $3 million per carat for museum-grade stones, but the days of $4 million-plus comps are behind us unless a sovereign wealth fund enters with a cultural-acquisition mandate.
Two follow-on events warrant tracking. First, Sotheby's has a 6.8-carat vivid blue scheduled for its New York Magnificent Jewels session in mid-April 2025; the reserve is rumored to sit at $18 million, and failure to clear would signal that the $3 million per carat floor is softer than Geneva suggests. Second, the Argyle mine closure in 2020 has tightened supply of fancy-color goods, but lab-grown alternatives are now chemically indistinguishable at the 3-5 carat range. If a Hong Kong house begins selling lab blues above $500,000, the natural-diamond comps collapse within 18 months.
Christie's has not disclosed whether the 'Ocean Dream' will appear in its 2025 private-sales catalog, but the pattern holds: stones that trade publicly in Geneva often resurface in private deals within three years, typically at a 12-18% markup to auction hammer.
Branded by POPS4 · proof in 60 seconds
For the principal
If holding colored diamonds acquired pre-2022, mark to $3M per carat and consider exit before Sotheby's April comp prints lower.
For the operator
Watch Sotheby's New York blue-diamond result in April; sub-reserve close confirms rotation out of non-yielding hard assets continues through 2025.
For the house
No direct exposure. Monitor for private-sale arbitrage if 'Ocean Dream' re-emerges in 18-24 months at markup to Geneva hammer.
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