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EVENT / TOPICHistorical

Grand Condé Pink Diamond Re‑appears at Château de Chantilly Amid Falling Natural Diamond Prices

1 reports1 sources10/18/2026 updated

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The nine‑carat Grand Condé pink diamond was unveiled at the Château de Chantilly on October 17, marking its first public display in almost a century. Its return comes as natural diamond prices continue to slide, with the average price per carat falling to $3,898—about 51 % lower than in 2021. In contrast, lab‑grown diamonds, which cost roughly one‑tenth of natural stones, now command 61 % of the ring market in 2025, underscoring rarity and provenance as the new drivers of value. The Grand Condé’s re‑appearance highlights the growing distinction between natural and synthetic gems, while the market shift toward lab‑grown stones reflects both cost advantages and consumer demand for ethically sourced materials. Together, these trends suggest a re‑definition of luxury in the diamond industry, where authenticity and origin are becoming as important as size and color.

Written with AI from the reporting · updated 10/18/2026

Latest developmentOct 19, 00:36
Priceless pink diamond returns to public view in France nearly 100 years after theft
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  1. 1Unclassified fact stationOct 17, 00:00recorded Oct 19, 01:20single source

    Grand Condé pink diamond returned to public view in France

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    Evidence & revisions · 1 source records
    Subject：
    Grand Condé
    Action：
    displayed at Château de Chantilly
    Object：
    nine-carat pink diamond
    Occurred (fact side)：
    Oct 17, 00:00
    BeInCrypto ↗Report pageOriginal / first version
    Published (valid side)：
    Oct 19, 00:36
    First seen (known side)：
    Oct 19, 01:20
    Fact stationSingle source · one-sided claim

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Oct 19
  1. BeInCryptoRelated fact: single source
    Priceless pink diamond returns to public view in France nearly 100 years after theft

    Report first recorded Oct 19, 01:20

    The nine-carat Grand Condé pink diamond went on display at the Château de Chantilly on October 17, nearly a century after two amateur thieves stole it in 1926 and hid it inside a hollowed-out apple. Natural diamond prices have crashed, with the average 1-carat stone dropping 51% from $8,007 in 2021 to $3,898, and the IDEX Diamond Index hitting a record low of 2,490 points in early August. Lab-grown stones, which cost up to 90% less, now feature in 61% of engagement rings sold in 2025, widening the gap between mined diamonds and precious metals like gold.

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