23 carat gold synthetic corundum ruby ring Swedish 1944


A ring with a lot to say. Shank is hallmarked 23 carat dated 1944. The engraving inside reveals that it has been remodelled in 1965 with the addition of the stone and 18ct setting. The stone is a synthetic corundum ruby or pink sapphire with a faceted tip but a cabochon table in a cushion shape. This is a very unusual colour and cut. Can be resized.

  • metal : 23ct gold shank with 18ct setting hallmarked
  • stone : synthetic corundum
  • uk ring size : L 1/2
  • measurements : setting width 9.15mm | setting height 3.8mm | D-shape shank width 2.7mm x 1.1mm thick at the thinnest part.

1 in stock


A synthetic gem material is one that is made in a laboratory, but which shares virtually all chemical, optical, and physical characteristics of its natural mineral counterpart.

  • In 1837, Marc Antoine Gaudin made the first synthetic rubies by reacting alumina at a high temperature with a small amount of chromium as a colourant.
  • In 1847, J. J. Ebelmen made white synthetic sapphires by reacting alumina in boric acid.
  • In 1877, Frenic and Freil made crystal corundum from which small stones could be cut. Frimy and Auguste Verneuil manufactured artificial ruby by fusing BaF2 and Al2O3 with a little chromium at temperatures above 2,000 °C (3,630 °F).
  • In 1903, Verneuil announced that he could produce synthetic rubies on a commercial scale using this flame fusion process.

Additional information

Weight 0.1 kg
Dimensions 229 × 162 × 5 cm


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