What Makes a Diamond Most Valuable
A diamond's value depends on the 4Cs: carat weight, color, clarity, and cut. Large, colorless stones with high clarity and precise cut grades typically command the highest prices. Rarity increases sharply with size, making multi-carat, gem-quality diamonds especially scarce.
Famous High-Value Diamonds
Some diamonds are famous for record sales or exceptional characteristics. The Cullinan Diamond, discovered in 1905, remains the largest gem-quality rough diamond ever found. The Hope Diamond, a 45.52-carat deep-blue stone, is one of the most recognized gems in the world. The Pink Star sold for over $71 million at auction, setting a per-carat record for a gem diamond.
How Diamond Value Is Determined
Gemological laboratories such as the Gemological Institute of America grade diamonds and issue certificates that document their 4Cs. Auction houses, dealers, and retailers use these reports as a basis for pricing. Market demand, provenance, and the quality of the cut also influence final value.
