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Showing 10 results for "garnet"
Two Notable Color-Change Garnets

The gemological properties and chemical compositions of two unusual color-change garnets are reviewed.

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Abstracts; Summer 1991

From the Summer 1991 issue of Gems & Gemology, a summary of important gemology-related articles published in other journals.

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The Elahera Gem Field in Central Sri Lanka

The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.

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Scanning Electron Microscopy in Gemology

An explanation of the basic principles of the SEM-EDS system with examples of its efficacy in the field of gemology.

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Figure 6 Article
Sapphire Series Part 3: Modern Synthetic Sapphire Applications

The third in the series, "Sapphire: A Crystal With Many Facets," this article looks at various emerging applications for synthetic sapphire.

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Sri Lankas gemstones Article
Sri Lanka: Treasure Island

A gemological tour of Sri Lanka’s gemstones.

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Roraima Mountain (left) and outcrop of Roraima Supergroup rocks (right).
A Look at Diamonds and Diamond Mining in Guyana

Reports on diamonds from Guyana’s alluvial deposits, including mining history and practices.

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Optimizing Face-Up Appearance in Colored Gemstone Faceting

How contrast patterns can increase perceived brightness and optimize a gemstone's appearance.

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Sintered zirconia necklace
New Technologies and Techniques

Poster abstracts on “New Technologies and Techniques” from GIA’s 2018 International Gemological Symposium.

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Freshwater pearl samples
Provenance Discrimination of Freshwater Pearls by LA-ICP-MS and Linear Discriminant Analysis (LDA)

Investigates trace-element chemistry of freshwater natural pearls from North America and China with LA-ICP-MS and uses LDA to identify their origins.

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