Learn about the principles, mechanisms, and characteristics of luminescence that create the impressive and memorable glow of gemstones.

全球经济动荡已开始波及超级富豪 — 2015 年 BASELWORLD （巴塞尔国际钟表展）上顶级宝石、钻石和设计师珠宝产品的最大需求群体 。

An overview of the Winter 2024 Gems & Gemology content.

GIA’s laboratories use advanced instrumentation and research to deliver accurate grading, identification, and origin determination for natural and laboratory-grown diamonds, colored stones, and pearls.

Infrared spectroscopy, specifically FTIR analysis, measures atomic vibrations to determine identity, cause of color, and potential treatments by analyzing how a gemstone absorbs infrared light.

Gemology has become a highly technical field employing analytical instruments for gem testing, driven by the need to address increasingly complex identification challenges in the marketplace.

GIA ensures accurate gemological measurements across its global laboratories through rigorous metrology practices, including systematic instrument calibration, validation from traceable standards, and continuous monitoring by trained staff to maintain precision and consistency.

X-ray imaging techniques revolutionized pearl testing by enabling gemologists to distinguish natural from cultured pearls through detailed visualization of their internal structures, evolving from film-based systems in the early 1900s to today’s sophisticated digital equipment.

The primary chemical analysis methods applied in gemology are XRF, which uses X-ray emissions for nondestructive testing, and LA-ICP-MS, which provides detailed analysis and greater sensitivity. LA-ICP-MS has become essential for origin determination and treatment detection.

Photoluminescence imaging, which analyzes how gemstones glow under ultraviolet light, is an important analytical tool for detecting impurities, natural versus synthetic gems, and treatments through the observation of fluorescence and phosphorescence patterns.

Photoluminescence spectroscopy examines how gemstones absorb and emit light, uncovering crucial details about their identity and color origin through the detection of microscopic defects and impurities.

Raman spectroscopy and XRD techniques are used to identify gemstone species through their atomic-scale structures, with Raman spectroscopy analyzing inelastic light scattering from crystal lattice vibrations and XRD examining X-ray interference patterns from atomic layers.