Tucson 2018 Overview
An overview of the 2018 Tucson gem shows.
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.
Michael Dyber’s Innovative Gem Carving
Michael Dyber discusses his approach to gem carving.
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.
Fortieth Anniversary of the Belmont Mine
Marcelo Ribeiro offers an update on mining and cutting activities at the Belmont emerald mine in Brazil.
Outlook on Opals from Mexico and Australia
Jürgen Schütz discussed the opal sourcing and cutting activities of the German firm Emil Weis.
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.
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.
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.
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.