Guardians of Trust: GIA’s Innovative Research, Instruments and Services
GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.
Gemstone Durability: Design to Display
A treatise on the design, display, care and repair of fine gemstones.
Carving Gem-Quality Opal
An examination of the challenges of carving gem-quality opal.