A factual overview, with no promise of returns, from an independent diamond dealer with nearly 30 years in diamonds, including 20 years buying rough mine production. This is not financial advice.
A very high-quality natural diamond, certified by a recognised laboratory, can act as a long-term store of value, much like a work of art or a rare object. But unlike gold, there is no official price or standardised market: each stone is unique, and its value depends on precise expertise. A diamond is better suited to long-term wealth diversification than to a search for quick returns.
Professionals generally agree on a few criteria for stones intended to hold their value: colour D to F (near-colourless to colourless), clarity IF to VVS (inclusions invisible or near-invisible to the naked eye), Excellent cut, and a weight of 1 carat or above, very large high-quality stones being disproportionately rarer. Certification by an independent laboratory (GIA or HRD) is non-negotiable.
For anyone seeking a store of value, this distinction is decisive. Lab-grown diamonds are produced industrially within weeks and in growing quantities, which has caused a continuous price decline over recent years. Natural diamonds, by contrast, remain the product of a geological formation spanning hundreds of millions of years, a rarity that cannot be industrially reproduced.
The "diamond investment" sector unfortunately attracts some unscrupulous players. A few warning signs to know:
Reselling a diamond takes time, generally more than selling a listed financial asset or even gold. You should also expect a gap between purchase price and resale price, which compensates for expertise and intermediation. A diamond should therefore not be considered for short-term liquidity needs.
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