Summer 2008

Lab Notes

DIAMOND

• With Color Contributed by the 594 nm Center?
• Subtle Flash-Effect Colors in a Filled Diamond
• "Unidentified Clarity Characteristic" in Diamond

Gem-quality CVD SYNTHETIC DIAMOND with Traces of Boron

Bleached Pinctada Margaritifera CULTURED PEARLS in Non-"Chocolate" Colors

Blue-Green PLAGIOCLASE FELDSPAR, Possibly Colored by Copper

Unusual Green Fluid Inclusions in QUARTZ

Inclusions within Inclusions in RUBY

Blue SAPPHIRE, with Unusually High Concentration of Rare-Earth Elements