Robuta

Introducing a new technique in diamond cutting that virtually eliminates the

This document provides the publication information for Gems & Gemology

Blue pectolite from the Dominican Republic, also known by the trade name Larimar, has recently entered the U.S. market.

Rare material seen at the GJX show in February 2015.

Located just 3 km south of the famous Umba locality, the geologically similar Kalalani area hosts deposits of gem-quality sapphire.

Two dark brownish red faceted stones, recently submitted to the GIA Gem Trade Laboratory for standard origin-of-color reports, were found to be treated...

This section, from the Summer 1992 issue of Gems & Gemology, is a compilation of interesting finds from GIA's laboratories.

A bracelet created to simulate the properties of golden coral is proven to be a plastic imitation.

Quantitative measurements of magnetic susceptibility combined with RI or SG data can provide an easy and inexpensive way of inferring garnet composition.

A survey of the current gemological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline, and topaz.

The second instance of Russian emerald with a rare purple fluorite inclusion may hint at origin.

Commentary on a 2013 German article, translated as

Examination of two chameleon diamonds reveals color enhancement through artificial irradiation.

This document provides the publication information for Gems & Gemology

A report from Tucson on the outlook of the pearl market.

Reports on a recently discovered eluvial deposit of honey yellow danburite with excellent transparency.

A Very Light pink diamond showing a uniform plane of color intersecting with a cone of strain that fit perfectly into a colorless hole is studied at the...

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry...

this article reviews the rise of the modern diamond cutting industry in India and its impact on the world diamond trade

A report on Zambian emeralds with tourmaline inclusions.

The authors present the mineralogical and gemological properties of rubies found recently in the Morogoro area of Tanzania that have many features in common...

A large natural pearl discovered in an edible oyster offers insight to the scientific pearl community.

Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a...

A green cabochon from China resembling jadeite is found to be antigorite, a member of the serpentine group.

This document provides the publication information for Gems & Gemology

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry...

Provides a visual guide to the internal features of natural, treated, synthetic, and imitation opal.