怎样买钻石？揭秘天然钻石投资法则

Core Insights - The U.S. diamond jewelry industry is experiencing significant market shifts due to two major events: Taylor Swift's 10-carat engagement ring sparking a surge in demand for natural diamonds, and the U.S. imposing a 50% tariff on diamonds from India, leading to increased global diamond processing costs [1][2]. Market Trends - The tariff on Indian diamonds has resulted in a 30%-50% increase in the cost of natural diamonds in the U.S., as India handles 90% of the global diamond cutting and polishing [2]. - The global production of natural diamonds is expected to decline by 40% from its peak in 2013, with estimates for 2025 ranging between 20-23 million carats [2]. - The engagement ring worn by Taylor Swift, valued at approximately $1 million, has significantly influenced consumer interest, with a 45% year-on-year increase in inquiries for natural diamonds over 5 carats in high-end jewelry stores [2][4]. Pricing Dynamics - The natural diamond price index rose by 2.8% in Q3 2025, with a 5.3% increase for round diamonds over 1 carat, while the average price of lab-grown diamonds has dropped by 25% to $1,500 [4]. - The market is witnessing a revaluation of "scarcity," with the Gemological Institute of America (GIA) changing its grading system for lab-grown diamonds, further diminishing their comparability to natural diamonds [4]. Purchasing Strategies - Rule 1: Prioritize diamonds over 2 carats with a clarity of VS2 or higher, which have shown an annualized return of 8.7% over the past decade, outperforming gold and the S&P 500 [5]. - Rule 2: Ensure diamonds come with authoritative certification and blockchain traceability to avoid market pitfalls [5]. - Rule 3: Consider brand premium and cultural value, as branded natural diamonds typically command a 30%-50% higher price at auctions compared to non-branded ones [5]. Conclusion - The natural diamond market is evolving from a consumer product to a hard asset, driven by scarcity and brand value, with strategic purchasing becoming essential for long-term investment [5].