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Jewelers to the Maharajas of Jaipur and Modern-Day Moguls

Enter a world not well-known in the West—the world of the maharajas and their jewelry, coveted by the modern-day moguls of business, entertainment, and royalty. See the fantastic works of art made today in the form of enameled Kundan meena jewelry and the regal look of polki diamonds.

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Color Grading “D-to-Z” Diamonds at the GIA Laboratory

This article discusses the history and ongoing development of GIA's color grading system, and explains how its laboratory applies it.

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De Beers Natural versus Synthetic Diamond Verification Instruments

Two instruments have been developed at De Beers DTC Research Centre, Maidenhead, to distinguish synthetic diamonds from natural diamonds.

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Gemstone Durability: Design to Display

A treatise on the design, display, care and repair of fine gemstones.

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Pitfalls in Color Grading Diamonds by Machine

Two major sources of error make spectroscopically determined color grades unreliable.

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The GEM DiamondMaster and the Thermal Properties of Gems

Thermal properties and the potential applications of the GEM DiamondMaster in testing them.

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Revolution in Diamond Cutting: Laser Sawing of Diamond Crystals

This article describes the components and operation of the laser saw and its usefulness in diamond cutting.

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Modern Diamond Cutting and Polishing

Over the last 25 years, the diamond-cutting industry worldwide has been revolutionized by sophisticated instruments that provide invaluable aid in the process of creating a polished gem.

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Fingerprinting of Two Diamonds Cut from the Same Rough

With the information from a combination of tools now available, the sophisticated gemologist can fingerprint a given stone.

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Modeling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Brilliance

A mathematical model which can analyze how appearance factors depend on proportions.

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