Diamond mining remains one of the most environmentally intensive extraction processes, prompting increasing consumer awareness about its ecological and ethical implications. While traditional mined diamonds require extensive earth-moving operations, lab-grown alternatives also present sustainability challenges, particularly concerning their energy consumption.
Lab-grown diamonds are often produced in countries such as India and China, where the manufacturing facilities rely heavily on coal-powered electricity grids. The energy used to create a single carat of lab-grown diamond can be comparable to the average monthly consumption of a Western household, raising questions about their overall environmental footprint.
De Beers, a prominent player in the diamond industry, has navigated these competing demands by initially entering the lab-grown diamond market. In 2018, it introduced Lightbox, a separate brand focused on supplying lab-grown diamonds to the fashion sector. However, following a significant drop in wholesale prices—around 90 percent—largely due to increased mass production, especially from China, De Beers discontinued Lightbox and recommitted to marketing mined diamonds exclusively.
To support the mined diamond market, the company allocates substantial funding, estimated at tens of millions of pounds annually, to an industry advocacy group known as the Natural Diamond Council. This organization has engaged well-known actresses such as Lupita Nyong’o and Lily James in promotional campaigns. These advertisements, disseminated across print, digital, and streaming platforms in the UK and internationally, emphasize the historic and geological uniqueness of mined diamonds, highlighting their formation over millions or even billions of years. The campaigns also point to the economic benefits these resources have brought to nations like Botswana, where diamond mining has contributed to poverty reduction.
In a notable regulatory development in May, the UK’s Advertising Standards Authority (ASA) issued rulings limiting the terminology synthetic diamond retailers may use in marketing. The ASA found that two companies—Linjer, based in Hong Kong, and Novita Diamonds, operating out of Australia—employed language that could mislead consumers into believing their synthetic products were mined diamonds by using the term “diamond” without proper qualifiers. Consequently, these retailers were instructed to avoid using the term “diamond” in isolation in their advertisements, reinforcing distinctions between mined and synthetic stones.
These dynamics illustrate the ongoing tensions within the diamond sector as it adapts to evolving consumer preferences, environmental considerations, and regulatory frameworks aimed at transparency and ethical sourcing.