In the eighteenth century, the discovery of diamonds in Brazil increased the available supply; diamond jewelry became quite fashionable, sparkling in the candlelight at evening balls and social events. Engagement rings from this time are charming and romantic, with diamond-set crowned hearts, bows and sprays of flowers.
The wealth generated by the Industrial Revolution, coupled with newly discovered diamond mines in Africa, made diamonds available to the wider public in the Victorian age. Sentimental themes remained popular; larger clusters and bands of diamonds were also favored. Queen Victoria chose a snake ring, whose coils symbolized eternity, to mark her engagement. In 1886, Tiffany introduced the six-prong solitaire diamond engagement ring.
The antique engagement rings available today are primarily those from the first half of the twentieth century. White gold and platinum filigree rings were popular from the turn of the century through the twenties; the intricate, lace-like detail loved by Edwardian era ladies still holds a special appeal for women today. Platinum and diamond Art Deco rings often featured geometric shapes and colored accent stones (ruby, sapphire, or emerald). Both yellow and white gold, often in combination, were common for engagement rings in the thirties and forties. Small side diamonds, and delicately-carved hearts, flowers, and leaves, gave these rings a romantic charm ideal for the occasion. Square-shaped and "illusion" settings beautifully showcased the center diamonds.