Find out about how GIA is addressing industry concerns over undisclosed laboratory-grown and simulated fancy melee being mixed in with natural fancy melee.
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 MoreA report on the colour treatment process for these intensely greenish yellow to yellowish-green cultured pearls and the techniques for identifying them.
Read MoreA look at the gemmological properties and chemical composition of this light blue to light green to green gem material, which is suitable for cabochon cutting.
Read MoreExplores statistical data and defining characteristics of gem-quality CVD synthetic diamonds examined by GIA since 2003.
Read MorePresents the underlying physics and methodology of this analytical technique, which has become an essential tool in identifying treated and synthetic diamonds.
Read MoreLearn about Mozambican rubies, including their mining history, characteristics and market demand.
Read MoreGIA researchers in New York recently had the opportunity to examine one of the most interesting and unique diamond crystals ever found.
Read MoreCheck out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
Read MoreGIA researchers analysed more than 90,000 natural pink diamonds to better understand how these rare and beautiful diamonds formed and got their colour.
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