+1 (323) 271-0307 seller [at] mail.ceygems.com
You currently have
in your basket.
RSS

Blog

Gemstone Enhancements

Gemstone Enhancements

 

Surface Treatments

 

Cleaning

Alcohol/acetone: Sapphires, Ruby

Colorless impregnations

Colorless oils, waxes, plastics to obtain better a better surface finish by hiding or filling up cracks or surface irregularities.

Colorless impregnations

Colorless oils, waxes, plastics to obtain a better surface finish by hiding or filling up cracks or surface irregularitions.

Colored impregnation

Dyeing

Gem materials are immersed in dyes and a layer of dye deposit on evaporation.

Foils and Colourbacking

Colored foil or paper are placed behind poorly coloured stone, in a closed setting to improve colour or simulate star effect.

Heat Treatments

Beryl

  • Greenish Beryl ----> 450 centigrade --->aquamarine (blue)
  • Brownish Beryl ---> 450 centigrade ---> morganite (pink)

Corundum

  • Ruby violet, brownish, dark red ----> Ruby
  • Sapphire gray, dark blue. geuda, ottu ----> Blue Sapphire
  • Yellow Sapphire ----> Pinkish orange (Padparaga)

Quartz

  • Poor quality amethyst --> 350 - 450 centigrade ----> Citrin

Topaz

  • Yellow Topaz ---> 550 centigrade ----> Pink Topaz

Tourmaline

  • Dark green ----> Emerald green

Zircon

  • Reddish brown zircon --> 1000 centigrade ----> Blue zircon
  • Reddish brown zircon --> oxidizing ----> Colorless or red zircon
  • Reddish brown oxidizing ----> Colorless or red zircon

Corundum - Surface diffusion

Transforming pale or colourless corundum into ruby or blue sapphire. Faceted stones are packed with transition element additives and heated to over 1750 centigrade which produces a very thin coloured layer on the surface.

Blog archive
Copyright © 2018 Ceylon Gems. All rights reserved.