Articles and Columns
Describing Color in Gemstones, Color Communication
by David Weinberg
People perceive color differently and their impressions are probably created from the time they receive their first set of crayons. Our verbalization of color is based on the GIA/Munsell color grading system. There are other ways to describe colors but the GIA/Munsell system is most convenient for gemstones...
Harmony of Jade
by Shelagh McNally
Jade is one of the most ancient stones we have. It resonates peace and nurturing and is believed to improve memory while encouraging wisdom and understanding by balancing emotions and calming the mind....
Rubies and fancy sapphires heat-treated by the "new" method
by Ted Themelis
For more than eight months gemmological laboratories and gem trading associations have been trying to resolve issues surrounding the "new" heat treatment process for yellow, orange and similarly appearing sapphires. At this time, the most current issue is how to disclose this treatment to the consumer in such a way that will be scientifically correct and commercially acceptable...
Peridot story, the known facts
by Janna Semenova
Peridot (pronounced pear-uh-dot) is a French word derived from the Arabic word "faridat" which means gem. This stone has been accepted as the birthstone for August and can also be called olivine or chrysolite. Fine peridot is a rich and beautiful gemstone which is medium to dark green...
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