Synthetic ruby ring 18ct y/g Swedish dated 1954

£230.00

Oval cabochon set East – West synthetic Corundum Ruby ring set in18ct y/g. Fully hallmarked with Swedish stamps and dated 1954. Can be resized.

  • metal : 18ct yellow gold hallmark
  • stone : synthetic corundum ruby cabochon cut
  • uk ring size : O and 3/4
  • measurements : width setting 8.5mm | setting height 6.1mm | shank width 2.25 x 0.7 thick at the thinnest part
  • era : dated with hallmark 1954 Sweden makers mark JP

Out of stock

Description

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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