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Demand was brisk at the 2018 AGTA show in Tucson.
Tucson 2018 Overview

An overview of the 2018 Tucson gem shows.

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Five aquamarines cut by Arnoldi International
Multi-Generation Cutting Family from Idar-Oberstein

Alexander Arnoldi explains the strategy of Arnoldi International and provides an update on some new high-quality materials.

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Aquamarine carving by Michael Dyber
Michael Dyber’s Innovative Gem Carving

Michael Dyber discusses his approach to gem carving.

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The Geometeer, a synthetic ruby with a hybrid cut by Rex Guo.
Rex Guo: The Science and Art of Recutting Fine Gemstones

Rex Guo describes how he sources and systematically recuts faceted stones to unlock their inner beauty.

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13 ct emerald from Belmont mine’s underground tunnel
Fortieth Anniversary of the Belmont Mine

Marcelo Ribeiro offers an update on mining and cutting activities at the Belmont emerald mine in Brazil.

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Mexican fire opal with good claritiy
Outlook on Opals from Mexico and Australia

Jürgen Schütz discussed the opal sourcing and cutting activities of the German firm Emil Weis.

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Drilled natural pearls examined in this study.
Saltwater Pearls from the Pre- to Early Columbian Era: A Gemological and Radiocarbon Dating Study

Examines 85 saltwater natural pearls, reportedly harvested from the Caribbean islands off the coast of Venezuela during the early 16th century, to determine their age.

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Article
Diamond Cut: The Wow Factor

Learn the basics of the GIA Cut Grading System for round brilliant cut diamonds to help pick out your perfect diamond.

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Brazilian Diamonds: A Historical and Recent Perspective

Recounts the history, geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production.

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The 135.74 ct Grand Sapphire
The Grand Sapphire of Louis XIV and The Ruspoli Sapphire: Historical and Gemological Discoveries

Archival research and gemological characterization reveal the true story of this 135.74 ct blue sapphire from the French crown jewels.

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