Chemical Analysis of Zircon
Trace-element analysis is used to identify metamictization, treatment, and growth conditions of zircon.
在 GIA 鉴定所鉴别出的近无色的米粒尺寸高压高温 (HPHT) 合成钻石 (英语)
The Bangkok lab examines near-colorless HPHT synthetic diamonds in melee sizes.
LPHT 热锻的粉红色 CVD 合成钻石 (英语)
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.
Phosphorescence of Synthetic Sapphire
A synthetic colorless sapphires is tested to identify the source of its phosphorescence.
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.
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