Winter 2010
Lab Notes
DIAMOND
Lab Sees Increasing Number of Large HPHT-Treated Type IIa Diamonds
One Dapper Diamond
Pale Pink Diamonds, Coated Fancy Pink
SYNTHETIC DIAMOND
Intense Purplish Pink HPHT-Grown/Treated Synthetic Diamond
Large (4+ ct) Yellow-Orange HPHT-Grown Synthetic Diamond
Silicon-Vacancy Defect Found in Blue HPHT-Grown Synthetic Diamond
Three Melee-Size Synthetic Diamonds
Artificial Metallic Veining in MANUFACTURED GEM MATERIALS
A Rare Natural Green PEARL
Rock Containing RICHTERITE and SUGILITE
Lead Glass–Filled RUBY Damaged During Jewelry Repair
Natural SAPPHIRE with a Sapphire Inclusion
SYNTHETIC SPINEL and SYNTHETIC RUBY Doublet
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