ARTFEED — Contemporary Art Intelligence

Taylor Swift's Engagement Ring Sparks Surge in Demand for Antique Old-Mine-Cut Diamonds

market-auction · 2026-04-20

Interest in old-mine-cut diamonds has skyrocketed following Taylor Swift's engagement ring, which showcases a seven-to-10 carat antique-style elongated cushion-cut gem. Dealers Charlie Barron from Barron London and Guy Burton of Hancocks London have noted a frenzy among collectors, with a 5.01 carat old-mine-cut diamond commanding a 25% premium compared to contemporary stones. Barron is experiencing high demand, with a waiting list for five to ten carat diamonds. This rising trend stands in contrast to lab-grown diamonds, as the natural imperfections of antique stones confirm their authenticity. Originating from Brazilian mines since the 1720s, these diamonds feature a soft square shape and a warmer luster, attracting younger clientele through designers like Santi, Jessie Thomas, and Rachel Boston.

Key facts

  • Taylor Swift's engagement ring features an estimated 7-10 carat antique-style old-mine-cut diamond.
  • Demand for genuine old-mine-cut diamonds has surged, with a 5.01ct stone fetching 25% more than a modern equivalent.
  • Charlie Barron of Barron London has a waiting list for diamonds of 5 to 10 carats.
  • The trend is partly a counter to lab-grown diamonds, as imperfections indicate natural origin.
  • Old-mine-cut diamonds originate mainly from Brazilian mines discovered in the 1720s.
  • Designers Jessie Thomas and Rachel Boston in London create contemporary jewellery with antique diamonds.
  • Charlie Pragnell of Pragnell acquired an untreated 8ct antique cushion-cut Kashmir sapphire from the 1880s.
  • Hancocks London specializes in modern gypsy rings set with rare coloured stones like Burma rubies.

Entities

Artists

  • Taylor Swift
  • Travis Kelce
  • JAR
  • Viren Bhagat
  • Santi
  • Margaret
  • Charlie Barron
  • Alistair McCallum
  • Guy Burton
  • Amy Burton
  • Charlie Pragnell
  • Jessie Thomas
  • Rachel Boston

Institutions

  • Barron London
  • Hancocks London
  • Marcus McCallum
  • Pragnell
  • GemGenève
  • Palexpo
  • FT

Locations

  • Paris
  • Mumbai
  • London
  • Geneva
  • India
  • Brazil
  • Golconda
  • Kashmir
  • Colombia
  • Burma
  • Switzerland

Sources