Introduction

The global discussion around diamonds and monopoly has historically centered on De Beers. For much of the 20th century, the company was closely associated with centralized control over diamond supply, shaping how diamonds were priced, distributed, and perceived worldwide.

However, the introduction of the “Supplier of Choice” (SoC) strategy marked a major turning point. This shift redefined how the diamond market operates, moving from monopoly-style control toward a more competitive and demand-driven structure.

Diamonds and Monopoly: Historical Industry Structure

The connection between diamonds and monopoly developed due to the unique structure of the diamond supply chain.

Key Drivers of Monopoly Perception

• Concentrated control over global rough diamond supply
• Centralized distribution through controlled sales channels
• Use of stockpiling to regulate availability and stabilize prices

At its peak, De Beers held a dominant position, influencing how diamonds entered the global market.

This system allowed for price consistency but also raised concerns about competition and market fairness.

Regulatory Pressure on Monopoly in the Diamond Industry

As the link between diamonds and monopoly became more evident, global regulatory bodies increased scrutiny.

Key legal and institutional frameworks included:

• Sherman Antitrust Act
• Oversight by the European Commission

These regulatory pressures made it increasingly difficult for a centralized system to operate without adaptation. As global markets evolved, the diamond industry began shifting toward more competitive structures.

What Is the “Supplier of Choice” Strategy?

The “Supplier of Choice” (SoC) strategy, introduced by De Beers in the early 2000s, was a key response to the long-standing association between diamonds and monopoly.

Rather than controlling supply in a centralized way, this strategy focused on aligning diamond distribution with market demand and business performance.

Core Features of Supplier of Choice

• Selection of authorized buyers (“sightholders”) based on transparent criteria
• Reduced emphasis on stockpiling diamonds
• Greater alignment with downstream demand (retail and consumers)
• Increased investment in branding and marketing

This marked a transition from supply control to demand alignment, reshaping how diamonds moved through the global market.

How “Supplier of Choice” Changed the Monopoly Structure

The implementation of Supplier of Choice significantly altered the traditional relationship between diamonds and monopoly.

Structural Changes in the Diamond Market

• Decentralization of Supply The diamond market became less dependent on a single controlling entity.
• Emergence of Multiple Producers Companies such as ALROSA expanded their independent market presence.
• Shift in Pricing Influence Pricing became more responsive to market dynamics rather than centralized decisions.
• Reduced Reliance on Exclusive Agreements Long-term exclusive supply arrangements became less dominant.

These changes contributed to a more distributed and competitive diamond ecosystem.

Role of Compliance and Transparency in Diamonds

As the industry evolved beyond monopoly structures, transparency and ethical sourcing became increasingly important.

Initiatives such as the Kimberley Process Certification Scheme were introduced to improve accountability in the diamond trade.

Key Developments

• Increased focus on traceability of diamonds
• Efforts to reduce the circulation of conflict diamonds
• Greater alignment with international compliance standards

These measures reinforced trust in diamonds while supporting a more open market environment.

Industry Evolution Beyond Monopoly

The transformation of the diamond industry was influenced not only by the Supplier of Choice strategy but also by broader global changes:

• Expansion of diamond production across multiple regions
• Entry of new competitors into the global market
• Growth of lab-grown diamonds as an alternative segment
• Changing consumer expectations around transparency and value

Together, these factors reduced the concentration of control and redefined how diamonds are traded globally.

Conclusion

The relationship between diamonds and monopoly has evolved significantly over time. Through the introduction of the “Supplier of Choice” strategy, De Beers shifted from a centralized supply model to a more market-oriented approach.

Today, the diamond industry reflects a more diversified and competitive structure, shaped by regulatory frameworks, global competition, and changing consumer expectations. While historical monopoly associations remain part of the industry’s legacy, the current market operates with greater complexity and broader participation.