Research Article Search Results

Reviews the mining history, market impact, and properties of ruby from northern Mozambique near Montepuez, now the world’s most productive source.

At the AGTA show, Rod Griffin (Rod Griffin Boulder Opals, Silverado, California, and Queensland, Australia) told us that the world market for all types of opals continues to be strong, but Australia’s opal industry is shrinking due to the costs, challenges, and changing regulations of mining.

Held October 21 and 22 at Cinema Row, the Chicago Responsible Jewelry Conference drew 200 attendees who heard industry experts discuss safe, sustainable, ethical gem production and jewelry design.

Summarizes data collected by GIA on more than 90,000 natural diamonds in this color range and presents their gemological and spectroscopic properties.

Lightbox, a De Beers company, has begun selling “white,” pink, and blue CVD laboratory-grown diamonds at a flat rate of $800 per carat.

Surprisingly, diamonds do not all form in the same way, but rather they form in various environments and through varying mechanisms.

Over the last decade, the production methods used to create synthetic diamond melee have improved substantially, along with the quality of the specimens themselves.

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.

Presents a visual guide to the growth processes and major gemological spectroscopic features of synthetic diamonds.

A first-person account of cutting a 3,019 ct piece of white opal to create a 1,040 ct gem with play-of-color across the surface.

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