At Tiffany & Co., every diamond begins with a commitment to rarity and ends in unmatched brilliance. We accept only the top fraction of gem-quality stones—less than 0.04%—selected for exceptional colour, clarity and natural beauty. Defined by cut, every round brilliant diamond of 0.18 carats or more is graded triple excellent, the highest standard for cut, polish and symmetry, maximising brilliance and light return. 

Unlike many jewellers, Tiffany & Co. cuts many of its diamonds in-house, reinforcing its leadership in diamond traceability. Through the Diamond Craft Journey, the House shares where its diamonds are sourced, cut, polished, graded and set—reflecting a deep commitment to transparency and social and environmental responsibility.

Tiffany & Co. creations are designed to stay with you for a lifetime, supported by services that ensure their beauty endures for generations. The House proudly stands behind the value of all its serialised diamonds by offering a Full Lifetime Warranty and complimentary premium care ensuring not only exceptional craft and artistry but a lasting relationship built on trust and care.