Research Article Search Results

The New York lab examines three pink CVD synthetic diamonds which have received LPHT annealing treatment.

Advances in pearl culturing are seen in a parcel of specimens from Strombus gigas gastropods.

An exceptional ruby is discovered in Namya, Myanmar.

A translucent Brazilian emerald exhibiting pronounced chatoyancy is examined.

A necklace of Chinese freshwater bead-cultured pearls demonstrates the strides made in culturing techniques.

Baroque pearls were ubiquitous at the Tucson 2015 gem shows.

The popularity of gem slices, particularly diamond, is on the rise, as reflected at the 2015 Tucson gem shows.

A hexagonal boundary, usually found in natural material, is observed in a synthetic star sapphire.

This large marble-hosted occurrence in the Pamir Mountains is a potentially productive source of corundum, including ruby with a bright red color reminiscent of “pigeon’s blood” Burmese rubies.

Examines a form of asterism comprising two six-rayed stars, one white and one that exhibits the stone’s bodycolor. Firsthand accounts and a survey of patent documents reveal that diffusion has been used to create or enhance this optical phenomenon in synthetic and possibly natural corundum since the 1950s.

Accompany GIA field gemologists on a true gemstone mining adventure to the emerald mines in the Panjshir Valley of Afghanistan, whose rugged inhabitants have held off 10 Soviet invasion attempts. See how emeralds are mined in a mountain source that few have witnessed.