Lab-Grown Diamonds: The End of Natural Diamonds?
A lab-grown diamond is diamond. Factories can reproduce the crystal, but they cannot reproduce its geological past. What does that do to an industry built around rarity?
We explain HPHT presses and CVD gas growth, trace Frances Gerety and N.W. Ayer’s advertising for De Beers, and examine the historic control of rough supply. Then we follow the price collapse, the Lightbox withdrawal, the announced two-year Venetia pause and The Knot’s engagement-ring survey.
Updated source check: Edahn Golan’s 7 October 2026 report shows a small quarterly rise in round wholesale prices after the long decline. Retailer costs are distinguished from customer ring prices. Mining employment proposals are distinguished from completed job losses. De Beers’ market explanations are identified as company claims.
General information about materials, manufacturing and markets, not personal financial advice. Backgrounds are conceptual illustrations; approved historical and location photographs are identified and credited.
Educational documentary. Not financial or investment advice.
In these topics
Chapters
- Cold open: two identical stones
- What a diamond actually is
- The marketing century: A Diamond is Forever
- The De Beers cartel and controlled scarcity
- HPHT: growing diamonds like GE did in 1954
- CVD: building diamonds atom by atom
- From industrial grit to engagement rings
- The price collapse: 2018 to 2026
- De Beers' own bet: Lightbox launches and fails
- The mines go quiet: Venetia suspended
- The ring on your hand: who's actually buying what
- Can rare survive a machine that makes it on demand?
Sources and credits
Photo credits (Wikimedia Commons)
- Diamond mine with workers at Kimberley, South Africa, 1896: Unknown authorUnknown author, Public domain - https://commons.wikimedia.org/wiki/File%3ADiamond_mine_with_workers_at_Kimberley%2C_South_Africa%2C_1896.jpg
- Premier Mine open pit, De Beers' South African mine: Gardner F. Williams, Public domain - https://commons.wikimedia.org/wiki/File%3APremier_Mine_Open_Pit.png
- Orapa diamond mine, Botswana (satellite photograph), one of De Beers' main mines: NASA/METI/AIST/Japan Space Systems, and U.S./Japan ASTER Science Team, Public domain - https://commons.wikimedia.org/wiki/File%3AOrapa_Diamond_Mine%2C_Botswana_%28ASTER%29.jpg
- Rough diamond specimen: DGPC/ADF Luísa Oliveira, CC0 - https://commons.wikimedia.org/wiki/File%3ARough_Diamond.jpg
- As-grown HPHT synthetic diamonds: Materialscientist (talk). Subsequent edits by Materialscientist., Public domain - https://commons.wikimedia.org/wiki/File%3AHPHTdiamonds2.JPG
- Diamond works, preparing diamonds for polishing, Tel Aviv: Matson Collection, Public domain - https://commons.wikimedia.org/wiki/File%3AJewish_factories_in_Palestine_on_Plain_of_Sharon_%26_along_the_coast_to_Haifa._Tel_Aviv._Diamond_works._Preparing_for_polishing%2C_close_up_LOC_matpc.19442.jpg
- Interior of Bright's Jewelry Store, Duluth, 1910: Jewish Historical Society of the Upper Midwest, No restrictions - https://commons.wikimedia.org/wiki/File%3AInterior_of_Bright%27s_Jewelry_Store%2C_Duluth_%284418733871%29.jpg
- Jewelry counter display, Wanamaker Building, Philadelphia: 1015saturdaynight, CC0 - https://commons.wikimedia.org/wiki/File%3AJewelry_display%2C_Wanamaker_Building_%28Philadelphia%29_%281%29.jpg
Primary sources
- GIA, natural and laboratory-grown diamonds (2019)
- Smit and Shirey, diamond ages, GIA Spring 2019.
- De Beers heritage timeline, Frances Gerety 1947.
- Russell Shor, rough diamond auctions, GIA Winter 2014.
- US Department of Justice, De Beers Centenary plea, 13 July 2004.
- ASME, diamond synthesis landmark (2024); Bundy et al., Nature, 9 July 1955.
- Linares, GIA CVD history, 30 April 2013.
- GIA CVD quality, Summer 2012; laboratory-grown update, Summer 2024.
- Edahn Golan, Q3 wholesale report, 7 October 2026; LGD Wholesale Price List.
- De Beers, Lightbox announcement, 8 May 2025.
- De Beers, portfolio announcement, 13 July 2026.
- The Knot, 2026 Real Weddings Study, 2025 purchases.
Not regulated financial advice.