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Research & 2024澳洲5168开奖历史记录查询:特别提及2024年澳洲5168的开奖历史记录查询,为彩民提供详尽的信息 News
This Month's
Color in Yellow Sapphire
Investigates the various chromophores responsible for color in four types of yellow sapphire.
GIA Knowledge Sessions
Engage in webinars on the most diverse and pressing issues in gemology today, including gemstone origin, laboratory-grown stones and new discoveries in field gemology.
Solid Laboratory-Grown Single-Crystal Diamond Ring
The quality and size of this 4.04 ct CVD-grown diamond ring demonstrate the advancing technology in laboratory-grown diamonds.
Spray of Columbite Crystals in Topaz
A cluster of bladed columbite crystals is identified in colorless topaz.
Eclogite: Diamond-Encrusted Ancient Seafloor
Explores eclogitic diamonds, which make up a significant portion of the gem diamond market, and what they reveal about Earth’s dynamic processes.
The Special Color Effect in “Chameleon” Amber
An examination of three Burmese chameleon amber specimens using 3D fluorescence spectroscopy.