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Showing 45 results for "red beryl"
"Emeraldolite": A New Synthetic Emerald Overgrowth on Natural Beryl

This article describes a new manufactured gem material marketed under the trade name "Emeraldolite," which is an epitaxial growth of flux synthetic emerald on opaque white beryl.

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Update on Diffusion-Treated Corundum: Red and Other Colors

Blue diffusion-treated sapphires have become a subject of considerable controversy since their introduction in significant quantities a few years ago.

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Identification of the Endangered Pink-To-Red Stylaster Corals by Raman Spectroscopy

All corals within the Stylasteridae family (including the Stylaster genus) are listed in Appendix II of CITES.

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Treated-Color Pink-To-Red Diamonds from Lucent Diamonds Inc.

Using a multi-step process, Lucent Diamonds has developed a new treatment process for certain natural diamonds that creates colors from pink-purple through red to orangy brown.

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Irradiated Topaz and Radioactivity

Large quantities of colorless topaz are currently being treated by gamma irradiation to turn them blue.

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An Update on Color in Gems. Part 1: Introduction and Colors Caused by Dispersed Metal Ions

This three-part series of articles reviews our current understanding of gemstone coloration.

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Article
Sri Lanka: Treasure Island

A gemological tour of Sri Lanka’s gemstones.

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Emerald crystals from Colombia, Afghanistan, and Zambia
Photoluminescence Spectra of Emeralds from Colombia, Afghanistan, and Zambia

Compares PL spectroscopy data of 48 emerald samples from three countries to evaluate the usefulness of the technique in geographic origin determination.

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Article
Unveiling the Cat’s-Eye Effect in a 75 ct Colombian Emerald Pair

This article examines the mysteries of rough emerald cutting through a spectacular pair of cat's-eye emeralds from Colombia.

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Gerd Dreher agate lily and Patrick Dreher citrine mouse
Gem Virtuosos: The Drehers and Their Extraordinary Carvings

A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.

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