The Blue Moon of Josephine
- Year
- sold 2015
- Rank
- 6 of 100
The Blue Moon of Josephine
The Blue Moon of Josephine (sold 2015) is ranked 6 in the FLOAT 100 for Jewelry. It sold for $48,400,000 on 11 November 2015. Highest price-per-carat for any diamond at the time (>$4M/ct); bought by Joseph Lau for his daughter.
What is it, and why is it in the FLOAT 100?
Highest price-per-carat for any diamond at the time (>$4M/ct); bought by Joseph Lau for his daughter.
12.03 ct cushion-cut Fancy Vivid Blue, Internally Flawless; ex-Cullinan Mine 2014
What is the best-sourced number for it?
- Figure
- $48,400,000
- Kind
- Realized at auction
- Date
- 11 November 2015
Sotheby's Geneva; $48.4M, then the most expensive jewel ever sold at auction. Renamed for Lau's 7-year-old daughter Josephine.
This is a realized sale. Somebody paid it. Source.
How this is made
- The figure
- One reference price, taken from a named public source and shown with its own kind. FLOAT does not average it with anything or adjust it for time.
- Realized or not
- A realized price is a completed sale. A market asking price and a price-guide value are not sales, and are labeled as such wherever they appear.
- Why no grade ladder
- Most FLOAT 100 entries are individual objects. There is one of this, so there is no population and no spread across grades to show.
- Archive
- 2026-08-08