This article describes the components and operation of the laser saw and its usefulness in diamond cutting.
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This article explores and identifies the changes that type IIa GE POL diamonds experience before and after HPHT annealing.
Read MoreOver the last 25 years, the diamond-cutting industry worldwide has been revolutionised by sophisticated instruments that provide invaluable aid in the process of creating a polished gem.
Read MoreExamination of a 0.40 ct near-colourless round brilliant diamond with a large inclusion resembling a dumbbell
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GIA researcher analyses and confirms that De Beers’ Lightbox diamonds are grown using the chemical vapour deposition process.
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This article illustrates the various features in filled diamonds and explores the best techniques for examining them.
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Exploration of a chart designed to give jewellers and gemmologists a practical guide to identifying synthetic diamonds as they enter the jewellery trade.
Read MoreThe L-Box™ can be used to compare the appearance of two or more diamonds, or fitted with a camera to capture a series of photos while the objects are moving. The images can be combined to build a high-resolution or 3D film.
Read MoreTwo major sources of error make spectroscopically determined colour grades unreliable.
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Find out about how GIA is addressing industry concerns over undisclosed laboratory-grown and simulated fancy melee being mixed in with natural fancy melee.
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