Research Article Search Results

Examines the growing percentage of rough diamonds being sold through auctions, a shift that has caused price volatility while opening up supply to more manufacturers and dealers.

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

Presents spectroscopic and phosphorescence data of the Blue Moon, a 12.03 ct Fancy Vivid blue diamond discovered at the historic Cullinan mine in early 2014.

A large scale gemstone mining company seeks to change the way the world acquires and sells fine gemstones.

Jewelers and gemologists use a specific set of terms to describe parts of a polished diamond. Certain measurements of the shape or proportions ultimately have an affect on the round brilliant diamond’s cut grade.

Join GIA on location at the Kagem emerald mine in Zambia and get an overview of what may be the largest emerald mine in the world. It’s an operation that is helping to revolutionize the colored gemstone industry.

Join GIA on location at the Montepuez ruby mine in Mozambique, the most important ruby discovery of this new century.

A rare look at natural pearls from a known Spondylus species, commonly called “thorny” oysters.

This synthetic ruby specimen features two growth methods within the same crystal.

Examination of a CVD synthetic diamond with an unusual pattern of growth dislocations that resemble natural inclusions.