The gemstone assigned to the 60th wedding anniversary is the diamond, a milestone so significant that it shares its popular name — the Diamond Jubilee — with the stone itself. The designation is recognised by Jewelers of America and by the National Association of Goldsmiths in the United Kingdom, two of the principal bodies that have codified modern anniversary gem lists. Reaching a 60th anniversary is among the rarest of matrimonial achievements, and the choice of diamond — the hardest naturally occurring material known, rating 10 on the Mohs scale — carries an unmistakable symbolic logic: a union that has endured six decades shares something of diamond's legendary resistance to wear.

The Tradition

Formalised anniversary gem lists developed gradually through the nineteenth and twentieth centuries, with earlier lists assigning materials such as coral, ivory, and amber to various milestones. Diamond appeared at the 60th position in lists that gained wide currency during the twentieth century, partly because the stone's extraordinary properties — its hardness, its optical brilliance, its chemical purity as crystallised carbon — lent themselves naturally to the language of endurance and clarity that a six-decade marriage invites. The term Diamond Jubilee itself entered broader English usage following Queen Victoria's Diamond Jubilee of 1897, which marked her 60th year on the throne, and the phrase subsequently reinforced the cultural association between the number sixty and the gemstone.

Why Diamond

Diamond's suitability for this anniversary rests on several converging qualities. Its hardness — the result of a three-dimensional lattice of covalently bonded carbon atoms in the cubic crystal system — means that a diamond set in jewellery at a wedding can, with reasonable care, survive intact to the 60th anniversary and beyond. Its refractive index of approximately 2.417, combined with strong dispersion (a fire value of 0.044), produces the play of spectral colour and brilliance that has made it the pre-eminent gemstone in Western jewellery for centuries. Symbolically, diamond's association with fidelity, invincibility, and eternal commitment — rooted in the Greek adamas, meaning unconquerable — aligns precisely with the qualities a 60-year marriage is understood to embody.

Jewellery Conventions

Gifts marking a Diamond Jubilee anniversary typically take the form of fine diamond jewellery: rings, pendants, earrings, or bracelets set with round brilliant-cut or fancy-cut stones. Eternity rings — bands set continuously with matched diamonds — are a particularly common choice, their unbroken circuit of stones serving as a further metaphor for unending commitment. Where budget permits, significant single stones in platinum or white-gold settings are favoured, though yellow gold remains traditional in many cultures. The quality parameters most relevant to a meaningful gift at this tier — cut, colour, clarity, and carat weight as assessed by the GIA grading system — are worth considering carefully, since a stone of modest size but excellent cut and colour will often outperform a larger stone of inferior make in terms of visual impact.

In the Trade

Retailers and auction houses alike recognise the Diamond Jubilee as a commercially significant occasion. Bespoke commissions for 60th anniversary pieces frequently incorporate diamonds from earlier family jewellery — resetting stones from an original engagement ring or wedding band into a new design — a practice that carries both sentimental and practical appeal. Gemmological laboratories such as the GIA, IGI, and Gübelin issue grading reports for diamonds presented as anniversary gifts, providing independent documentation of quality that is particularly valued when stones of one carat or above are involved.

Further Reading

• GIA Diamond Overview — gia.edu
• GIA: The 4Cs of Diamond Quality — gia.edu