Those gems materials which have pores surface or having surface reaching craks are introduction of colouring material into a gemstone to give it a new colour, intensify present colour or improve colour uniformity. For example Agate, carnelian, chalcedony, coral, ivory, jade, opal, pearl, quartz, turquoise etc.
The Quartz bangles which are shown below in picture is colored to make imitation of imperial Jadeite Jade and also sold in the name imperial Jadeite Jade in Market.
For more information of treatment and detectation of treatment please visit the following link
Detection: Magnification (concentrations of dye visible in veins and cracks), Spectroscope (Broad absorption bands due to chromium slats used as a dye), Most organic dyes will stain a swab moistened with acetone.
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| Dyed pores quartz under microscope |
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| Dyed pores quartz bangle under microscope |
Kindly visit my eBay store: https://www.ebay.com/usr/lavish_gems
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