Chemical Analysis of Zircon
Trace-element analysis is used to identify metamictization, treatment, and growth conditions of zircon.
GIAラボで鑑別されたほぼ無色のメレーサイズのHPHT合成ダイヤモンド (英語)
The Bangkok lab examines near-colorless HPHT synthetic diamonds in melee sizes.
LPHT-Annealed Pink CVD Synthetic Diamonds (英語)
The New York lab examines three pink CVD synthetic diamonds which have received LPHT annealing treatment.
Strong Pinkish Purple Freshwater Bead-Cultured Pearls
A necklace of Chinese freshwater bead-cultured pearls demonstrates the strides made in culturing techniques.
Assembled and Bead-Cultured Pearls
Examination of a baroque cultured pearl reveals a bonding agent, along with a damaged bead and new nacre.
Beryllium-Diffused and Lead Glass–Filled Orange Sapphire
A sapphire receiving two distinct forms of treatment is seen at the Carlsbad laboratory.
Fluorite Sphere with Phosphorescent Coating
Intense Blue Diamond with Very High Boron Concentration
A natural Fancy Intense blue diamond submitted to the New York lab shows the highest boron concentration ever reported in a natural specimen.
Rare Type IIb Gray-Purple Diamond
A natural type IIb diamond with rare color and very strong 776.4 nm PL peak is seen at the Carlsbad lab.
Phosphorescence of Synthetic Sapphire
A synthetic colorless sapphires is tested to identify the source of its phosphorescence.