Diamond color is all about what you can’t see. Diamonds are valued by how closely they approach colorlessness – the less color, the higher their value. (The exception to this is fancy color diamonds, ...

Birthstones are a fun, popular and colorful introduction to the world of gemstones. They appeal to audiences around the world regardless of gender, age, nationality or religion. Birthstones carry ...

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Jewelry-quality synthetic malachite is now being manufactured in the USSR. The texture, structure, and physical and physico-chemical properties of this synthetic malachite are reported. Three textural ...

Although lost for literally hundreds of years after the Spanish conquest of the Aztecs, many deposits of jadeite have been found in Guatemala during the last two decades. Following the discovery of ...

Diamond inclusions can be analyzed using Raman spectroscopy, ideally when they are close to or breaking the surface. The New York lab recently had the opportunity to study a rare inclusion of xenotime ...

Figure 1. In this high-quality translucent amazonite bracelet, the average bead diameter is 12 mm. Photo by Kevin Schumacher. A type of high-quality translucent blue amazonite feldspar (figure 1) has ...

Most people do not realize garnets come in a wide variety of gem types and colors, with many cutting options. Garnets are a set of closely related minerals that form a group, resulting in gemstones in ...

The GIA Colored Diamond Grading Report includes a full quality assessment of a colored diamond including the color grade and color origin (natural or treated), carat weight, and clarity along with a ...

Heating is an accepted treatment for sapphire. But for fine-quality sapphire, confirmation from an independent laboratory like GIA that there is no evidence of heat adds to a sapphire’s rarity and ...

Tom Munsteiner is a third generation gem cutter from Idar-Oberstein, Germany, a center for fine lapidary work from the Renaissance to the present day. Training with his father, Bernd Munsteiner, in ...

Iolite is found all over the globe, but it’s not as widely recognized as tanzanite. Some experts believe that jewelry designers and retailers don’t see a consistent enough supply of fine-quality ...