Allan Børge Larsen. Danish goldsmith (active 1967-2006). Modernist vintage ring in 14 carat gold adorned with purple amethyst. Diameter: 17 mm. US size: 6.5. In excellent condition. Stamped. Weight: 9 grams. This piece is attributed to the mentioned designer/maker. It has no attribution mark and no   official proof of authenticity,   however it is well documented in design history. I take full responsibility for any authenticity         issues arising from misattribution Formal 14k Stamped Amethyst Ring, Art Deco Amethyst Ring In Yellow Gold, Vintage Yellow Gold Amethyst Ring, Art Deco Yellow Gold Amethyst Ring, Yellow Gold Amethyst Ring In Art Deco Style, Elegant Amethyst Signet Ring For Formal Occasions, Yellow Gold Amethyst Ring With Rectangular Shape, Elegant Formal Amethyst Signet Ring, Art Deco Yellow Gold Amethyst Ring For Formal Occasions