Synthetic jadeite, the result of an experimental study, is examined in this article.

An examination of the skull-melting technique used to produce cubic zirconia, first introduced in 1976, as well as the market status of this diamond simulant and information about its production and quality.

This article discusses the results of an experiment conducted on heat-treated lavender jadeite.

This article describes the method of culturing these

An overview of some of the most fabulous and famous diamonds that Harry Winston has known.

Two major sources of error make spectroscopically determined color grades unreliable.

The authors examine an unusual crystal in matrix.

Advances in geophysical technology and computer imaging now permit mapping of geologic features at various depths beneath the Earth’s surface in more detail than ever before.

Gem-quality rubies and fancy-color sapphires have been recovered from dolomite marble lenses located high in the Himalayan mountains of east-central Nepal (Ganesh Himal).

A look at Smithsonian Nature Guide on Gems

India is emerging as a source of gem-quality kyanite.

An overview of ruby mining in the southern Indian states of Tamil Nadu and Karnataka.

The natural-color oolitic opal is the largest of its type examined by GIA.

Fluctuations in the diamond market brought a new focus in jewelry on small diamonds and colored stones.

During this period synthetics matured, with many new manufacturers and greater manufacturing capacity.

The 1980s witnessed great development in the application of new technologies to gemology.

This article, from the Spring 1994 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

Some manufacturers are known to have treated Verneuil flame-fusion synthetic rubies by immersion in a flux melt to induce patterns like the “fingerprints” seen in some natural rubies.

The discovery of significant quantities of gem-quality sapphire in Minas Gerais could add corundum to the formidable list of gem species already commercially produced in Brazil.

Tairus, in Novosibirsk, has produced yet another new type of Russian hydrothermal synthetic emerald.