📚 De Beers Diamond Monopoly
Core Lesson: Monopoly strategy, artificial scarcity
📋 Overview
| Attribute | Detail |
|---|---|
| Subject | Economics |
| Core Lesson | Monopoly strategy, artificial scarcity |
| Source | HBS / Top MBA Case |
🕰️ Background
De Beers controlled 80-90% of the global diamond supply from 1888 to the early 2000s, creating one of history’s most effective monopolies. The company: (1) Stockpiled diamonds to restrict supply, (2) Invented ‘A Diamond Is Forever’ (1947) — creating the cultural norm of diamond engagement rings, (3) Made secondary market resale difficult to prevent used diamonds from competing with new supply.
❓ The Central Problem
How did De Beers maintain a near-perfect monopoly for 100+ years? The case examines monopoly creation, demand creation through marketing, and what ultimately eroded De Beers’ market power.
📊 Analysis
De Beers’ monopoly maintenance required both supply control AND demand creation: (1) Supply: Bought up new diamond mines globally; agreed with governments (Botswana, Russia) to sell exclusively through De Beers’ Central Selling Organisation (CSO). (2) Demand: The ‘A Diamond Is Forever’ campaign is possibly the most effective marketing campaign in history — before 1938, diamond engagement rings were uncommon. De Beers created the ‘two months salary’ norm. (3) Anti-resale: By discouraging diamond resale (diamonds are ‘forever,’ not resold), De Beers prevented a secondary market from undermining new diamond prices. Erosion: (1) 2000s: Russia and Australia broke from CSO, (2) Lab-grown diamonds emerged as substitutes, (3) Antitrust pressure forced De Beers to abandon market share to ~35% today.
🔑 Key Lessons
- Monopoly profitability requires BOTH supply control AND demand creation — De Beers did both brilliantly
- Manufactured demand (diamond engagement ring norm) can be more powerful than natural demand — De Beers created a $80B+ market through marketing
- Monopolies are inherently unstable — new supply sources, substitutes (lab-grown), and regulation eventually erode market power
- Preventing secondary markets (resale) is a key monopoly maintenance strategy — if consumers resold diamonds, prices would collapse
🎓 Discussion Questions
- Was De Beers’ monopoly beneficial or harmful to consumers?
- How does the diamond market illustrate the concept of artificial scarcity?
- Will lab-grown diamonds ultimately destroy the natural diamond market?
🔗 Connected Concepts
- Supply and Demand — Artificial supply restriction
- Game Theory — De Beers vs. new entrants and cheating producers
- Pricing Strategies — Monopoly pricing power
- Behavioral Economics Overview — Manufactured preferences through marketing