Lab Notes Gems & Gemology, Spring 2003, Volume 39, No. 1

Spring 2003 G&G Lab Notes

Diamond with Fracture Filling to Alter Color
Intensely Colored Type IIa Diamond with Substantial Nitrogen-Related Defects
Diamond with Unusual Overgrowth
Euclase Specimen with Apatite and Feldspar
"Cherry Quartz” Glass Imitation
Cat’s-Eye Opal
“Blue” Quartz
Heat-Treated Ruby with a Large Glass-Filled Cavity
Play-of-Color Zircon
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