Yellow Zircon Special Jewellery.
By Aamir Mannan.
YELLOW ZIRCON YELLOW STONE
Yellow to brown zircon from ceylon show a strong and very distinctive spectrum of narrow bands distributed remarkably evenly through out the spectrum. The strongest bands are at wavelength 69I0, 6625, 6590, 6535, 5895, 5625, 5375, 5I50, 4840 and 4325 A. These and fainter bands can be seen in the drawing reproduce. Golden yellow zircons produced by heat treatment of brown crystals found in Indo-China do not show so strong or full a spectrum. But the 6535 
bands and in fainter 6590 compainion can always be seen, as narrow 'pencil lines' in the red. It should be remembered that the 'reflected light' technique should be used where bands are too faints to be easily seen in transmitted light.
.jpg)
This comment has been removed by the author.
ReplyDeleteThe strongest bands are at wavelength 69I0, 6625, 6590, 6535, 5895, 5625, 5375, 5I50, 4840 and 4325 A. voltairediamonds These and fainter bands can be seen in the drawing reproduce. Golden yellow zircons produced by heat treatment of brown crystals found in Indo-China do not show so strong or full a spectrum.
ReplyDelete