GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.
Read MoreLearn about the differences – and similarities – between natural and laboratory-grown diamonds, and how GIA’s researchers and grading laboratories can tell the difference
Read MoreLaser confocal microscopy, a very reliable method of revealing surface micro-features, is used on an HPHT synthetic diamond to reveal growth structures.
Read MoreA synthetic diamond seen in the Carlsbad lab is the largest faceted lab-grown diamond examined by GIA.
Read MoreA single natural diamond is found within the largest percentage of undisclosed synthetic melee submitted to GIA.
Read MoreIrradiated CVD-grown diamonds are examined in the Carlsbad lab.
Read MorePresents a visual guide to the growth processes and major gemmological spectroscopic features of synthetic diamonds.
Read MoreRetailers had mixed reactions to De Beers’ announcement that it would offer a low-priced line of synthetic diamond jewellery, called Lightbox.
Read MoreProvides a visual guide to the internal features of natural, synthetic and treated rubies.
Read MoreExamines 85 saltwater natural pearls, reportedly harvested from the Caribbean islands off the coast of Venezuela during the early 16th century, to determine their age.
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