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Precious opal contains a wonderful diffraction grating, formed by the line-up of ultra-microscopically tiny but uniformly sized spheres of silica. The net effects of this array is a three-dimensional diffraction grading, resulting in a spectacular display of spectral colours. If the little spheres are all quite uniform in size and have settled very slowly so as to form a very perfect array, then the colours are the most spectacular known in the gem world.
GENUINE AUSTRALIAN OPAL TRIPLET
CUT FROM COOBER PEDY OPAL
UNFORTUNATELY MY AMATEUR PICTURES DO NOT TO JUSTICE TO THE BRILLIANT COLOURS OF THE ACTUAL GEM!
1.83Gem Description Gem Type : Opal Triplet Quantity : 1 Weight (cts.) : Shape : Oval Cabochon Size (mm.) : 10 x 8 Depth: 3 Colour : Multi Color Clarity : Opaque Luster : Incredible Origin : Coober Pedy Australia Moh's Hardness : na Enhancement : Triplet
GIA KEY TO CLARITY FOR COLOURED GEMS
POSSIBLY OF HIGH LUSTRE BUT LIGHT DOES NOT PASS THROUGH THE GEM.VVS INCLUSIONS IF ANY CAN ONLY BE SEEN UNDER 10X MAGNIFICATION VS SMALL INCLUSIONS CAN ONLY BE SEEN BY THE NAKED EYE AT CLOSE RANGE. S INCLUSIONS ARE VISIBLE TO THE NAKED EYE. I INCLUSIONS ARE EASILY VISIBLE TRANSLUCENT LIGHT CAN PASS THROUGH THE GEM. OPAQUE
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