South African diamond mines are closing due to weak sales and lab-grown stones
Lab-grown diamonds are rapidly undercutting the market for mined stones, contributing to mine closures in South Africa and threatening economies like Botswana’s that rely heavily on diamond exports. Commenters weigh the ethical upside of displacing an industry long associated with exploitation against the loss of relatively well-paid local jobs and government revenue. Many see parallels to future disruptions in meat and fossil fuels, arguing that when high-quality, cheaper, and more ethical substitutes exist at scale, consumer norms and entire supply chains will shift.
Lab‑grown vs. mined diamonds
- Many argue lab‑grown diamonds are chemically identical and often higher clarity, making mined stones hard to justify ethically or economically.
- Others still prefer mined diamonds as luxury/Veblen goods, valuing “provenance” or even imperfections, and expect a smaller but persistent market for them.
- Several note that lab‑grown options now allow much larger, better stones at a fraction of prior prices; some recount upgrading or replacing stones cheaply.
- Comparisons are made to mechanical vs quartz watches: quartz and lab diamonds are technically superior/cheaper, pushing the “natural” versions into niche status signaling wealth or taste.
Ethics and reputation of diamond mining
- Strong condemnation of De Beers and diamond marketing (e.g., “diamonds = love”) as manipulative and built on exploitation and, historically, bloodshed.
- Some welcome mine closures as a net positive for human rights, not a “worker tragedy,” given notorious mining conditions.
- Others highlight Botswana’s dependence: diamonds form ~30% of GDP and major government revenue; debate over whether De Beers is exploitative or enabled development from an extremely poor baseline.
- Concerns raised that “ending child labor” can mask ongoing exploitation of adults, and that Botswana’s economy remains under‑diversified.
Market dynamics and future of natural diamonds
- Several expect demand for mined diamonds to collapse once lab‑grown stones are extremely cheap; others think a luxury niche will remain, especially in some cultures.
- Speculation on De Beers’ stockpile ranges from decades to less than a year; one commenter cites industry watching and claims roughly $2B in stock, ~5–6 months of sales.
- Noted that De Beers can’t easily monopolize synthetics because the technology is widespread (especially in China) and has large industrial uses.
Broader parallels: meat, energy, and synthetics
- Thread frequently analogizes lab‑grown diamonds to lab‑grown meat: debates about price parity vs needing to be substantially cheaper, ethical benefits, regulation of labeling, and cultural status/value.
- Another analogy is to transitioning from oil/gas to renewables: lab‑grown diamonds show how fast a synthetic, cheaper alternative can undermine an entrenched extractive industry.
- Mention that almost all gemstones now have lab‑grown counterparts, which hobbyist cutters welcome for low cost and uniform quality.
Technical uses of cheap diamond
- Some discuss doped diamonds as wide‑bandgap semiconductors, noting slow progress and major challenges vs SiC/GaN, but see big potential for cheap diamond heatsinks if prices fall further.