Liddicoatite – a calcium-rich lithium tourmaline – was recognized as a separate mineral in 1977 and named in honor of Richard T. Liddicoat, the second president of GIA who is often referred to as the “Father of Modern Gemology.”

Join GIA’s field gemologists as they venture into some of Brazil’s most important and productive emerald and tourmaline mines.

Review of Damiani: Alchemy of Desire.

Nine demantoids reportedly from a new deposit in the Khuzdar area in Pakistan’s Baluchistan province were recently examined.

Strong absorptions from N-V centers were the main cause of a CVD synthetic diamond’s pinkish orange bodycolor.

Review of Yvonne J. Markowitz and Denise Doxey's Jewels of Ancient Nubia.

Auction price records were broken in late 2014 as ultra-wealthy buyers vied for rare, important gemstones.

Examination of a pink-purple spinel revealed what appeared to be a spinel crystal inclusion.

Ten loose pearls with interesting shapes and internal growth features were from Pteria-species mollusks.

Although this stone bore some superficial resemblance to moissanite, its gemological properties were consistent with HPHT synthetic diamond.

Melee diamonds can be efficiently screened for synthesis and treatment using infrared absorption spectroscopy, DiamondView imaging, and microscopy.