A master gem carver bases his latest design off a stunning stained glass window when attempting the world’s largest known cut kunzite.

Whimsical windmill-like inclusions are found in a high-quality orange specimen of the rare mineral sphalerite.

Diaspore, an orthorhombic aluminum oxide hydroxide mineral with the formula AlO(OH), is a relative newcomer to the jewelry scene, with some stones possessing a captivating ability to change color between pale green, yellow, pink, and purple when viewed in different sources of light.

Many legends are told about the history of the Chivor emerald mine.

There’s only one place on earth where the general public can prospect for diamonds directly from a primary kimberlite pipe: Crater of Diamonds State Park.

Lee Downey, owner of Artifactual (Tucson, Arizona), spoke with us in early 2020 about his 35 years in the fossil ivory carving trade and the impact of ivory bans on his business.

Raman spectroscopy confirms sea-blue beads with a similar appearance to Larimar are actually quench-crackled chalcedony.

In recent decades, jadeite prices have risen dramatically. Driven by profit, a variety of imitations are found in the jadeite jewelry market.

了解 GIA 如何解决业界所担忧的问题，即未经披露的实验室制造钻石和花式米粒钻仿品与天然花式米粒钻混在一起。

对 GIA 专家而言，网络研讨会是一种轻松分享信息并与研究人员以及宝石和珠宝爱好者社区保持联系的非正式方式。

宝石学摄影记者 Robert Weldon（罗伯特·韦尔登）分享了他最喜欢的一些照片，并讲述了背后的故事。

Presents a quantitative means of determining the causes of color in a gem material, using corundum’s six major chromophores as an illustration.

A transparent supply chain and the education of artisanal miners were two of the many topics discussed at Tucson’s first Ethical Gem Fair.

A ring made entirely of natural diamond was recently submitted to GIA’s New York laboratory.

Violent kimberlite eruptions impact the surface features of diamonds, which can give scientists useful information about how diamonds react with the fluids in the mantle.

A rare Burmese star peridot cabochon is characterized by a soft four-rayed asterism and extremely fine acicular inclusions.

Advanced analytic techniques are critical for separating Ethiopian feldspar from Oregonian and copper-bearing feldspar with undetermined color origin.

Numerous needle-like inclusions exhibit vibrant interference colors in a suite of pallasitic peridot from the Jepara meteorite.

The unusual six-rayed trapiche pattern, identified mainly with Muzo emeralds, has also been discovered in Mogok sapphires and Mong Hsu rubies.

A freely moving diamond crystal completely enclosed in a diamond from Siberia gets its name from the famous Russian nesting dolls.