The Tiffany Yellow Diamond

Maker: Tiffany & Co.
Year: acquired 1878
Rank: 90 of 100

The Tiffany Yellow Diamond

The Tiffany Yellow Diamond by Tiffany & Co. (acquired 1878) is ranked 90 in the FLOAT 100 for Jewelry. It sold for $30,000,000 on 24 February 2019. Tiffany's crown jewel and brand identity stone - worn publicly only four times (Audrey Hepburn, Lady Gaga, Beyonce, 1957).

What is it, and why is it in the FLOAT 100?

Tiffany's crown jewel and brand identity stone - worn publicly only four times (Audrey Hepburn, Lady Gaga, Beyonce, 1957).

128.54 ct fancy yellow cushion-cut, 90-facet 'Stellar' cut

What is the best-sourced number for it?

Figure: $30,000,000
Kind: Realized private sale
Date: 24 February 2019

A published VALUATION, not a transaction — the Tiffany Yellow Diamond has never been sold since Charles Lewis Tiffany bought the 287.42 ct rough for $18,000 in 1878, and Tiffany & Co. (now LVMH) still holds it, unoffered, in its New York flagship. The Hollywood Reporter, 24 Feb 2019, headlined the stone at $30M and states: 'One estimate puts the stone's value at $30 million, though given its provenance and its role in the jeweler's heritage, it's understandable that Tiffany & Co. execs call it priceless.' The article names no appraiser, so treat this as a widely-repeated press estimate rather than a formal appraisal; CBS News carries the same level. Stone matches the identifier exactly: 128.54 ct cut from 287.42 ct rough, modified antique cushion brilliant, 90 facets, Stellar Cut Brilliant.

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