Examines 85 saltwater natural pearls, reportedly harvested from the Caribbean islands off the coast of Venezuela during the early 16th century, to determine their age.
Read More
Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular and Resorbed), that formed in a super-deep environment.
Read More
Details the process used by Wiede’s Carbidwerk to produce star synthetic corundum from the mid-1950s until the 1970s.
Read MoreDr Evan Smith, Ph.D., GIA research scientist, has dedicated his work to methodically characterising the inclusions found in rare diamonds. In this video presentation recorded at the 2017 JCK Las Vegas show, Smith shares his findings on the unexpected ori
Read More
Circumnavigate the boreal reaches of the globe to explore gems from polar regions.
Read More
GIA’s postdoctoral programme gives researchers access to gemmological data, equipment, and rare, unusual and large gems in its laboratories.
Read More
Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.
Read More
Field gemmologists share the challenges and opportunities of travelling to a Madagascar ruby deposit to collect samples to be used as reference material.
Read More
Discusses the role of three-phase inclusions in emerald, in combination with spectroscopy and trace-element analysis, in determining geographic origin.
Read More
Amber samples were heat-treated, using various procedures and parameters, in an effort to reproduce materials found in the jewellery market.
Read More
