Ruby Gold Bridal Katak Jewellery Necklace Set.

Ruby Gold Bridal Katak Jewellery Necklace Set.

By Stone.

Imitation rubies are also marketed. Red spinels, red garnets, and colored glass have been falsely claimed to be rubies. Imitations go back to Roman times and already in the 17th century techniques were developed to color foil red—by burning scarlet wool in the bottom part of the furnace—which was then placed under the imitation stone.