BLUE STONES Guadeloupe Beautiful Jewellery
By Aamir Mannan.
"TOURMALINE"
Blue tourmaline shows the same narrow band at 4970 A mentioned under "Green tourmaline".
"ZIRCON"
Blue zircon owes its colour to heat-treatment of reddish brown rough. At least two of the strongest of the zircon lines -those at 6535 and 6590 A can be seen, as narrow "Pencil Lines", especially when reflected light is used. Other of the main zircon bands may also show faintly in the yellow and green.
By Aamir Mannan.
"TOURMALINE"
Blue tourmaline shows the same narrow band at 4970 A mentioned under "Green tourmaline"."ZIRCON"
Blue zircon owes its colour to heat-treatment of reddish brown rough. At least two of the strongest of the zircon lines -those at 6535 and 6590 A can be seen, as narrow "Pencil Lines", especially when reflected light is used. Other of the main zircon bands may also show faintly in the yellow and green.
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