Lab Notes Gems & Gemology, Volume 45, No. 4

Winter 2009 G&G Lab Notes

A New Chalcedony Treatment
DiamondView Indicates Treatment in Irradiated Brown-Orange Diamond
Fancy Intense Blue Type IIb Synthetic Diamond
Diamond with Flower-Shaped Cloud
Unusual Trigon-Shaped Clouds Indicate Two Diamonds Cut from the Same Piece of Rough
Colorless Cat’s-Eye Phenakite
Blue Sapphires Diffusion Treated with both Titanium and Beryllium
Interesting Inclusion Aggregate in Tsavorite
Uranium Mineral as Inclusion in Turquoise
To view the full section, download the PDF above.