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    Chelsea Colour Filter




    Chelsea Colour Filter


    An instrument used to discriminate Natural Emeralds/ Natural Spinels from imitations and synthetic creations. This is a dichromatic colour filter transmitting light of only two wavelength regions one in deep red and the other in yellow green.

    Absorption Spectrum  :  Allochromatic Minerals  :  Asterism  :  Brilliance  :  Brilliant Cut  :  Cabochon Cut  :  Carat  :  Chatoyancy  :  Chelsea Colour Filter  :  Cleavage  :  Hardness  :  Inclusions  :  Lustre  :  Mohs Scale  : 
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