Lab NotesGems & Gemology, Winter 1993, Volume 29, No. 4

Winter 1993 G&G Lab Notes

Cubic Zirconia Carved to Imitate an Ancient Buddha Cyclotron-Treated Diamond Fancy-Color Diamond with Unusual Radiation Stains Unusual "Melted" Cavity in a Diamond Faceted Yellow Synthetic Diamond Emerald with Large Filled Etch Channels Fracture Filled Garnets Iridescent Orthoamphibole, "Nuummite" Orthopyroxene, a Carved Mask Some Pearl Observations Synthetic Ruby: Striae Resolution Technique Sapphire: A Difficult Identification Diffusion Treatment in Sapphire Obscured by Mounting Yag with Unusual Inclusions To view the full section, download the PDF above.

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