Gemstones can look dramatically different when viewed in different lighting conditions. The perceived color can make a huge difference when grading and pricing these gems. Understanding what light sources to use first requires a knowledge…
Featured ArticlesLike most sapphire varieties, white sapphire has experienced increased demand and higher prices during the past few years. Dealers in Sri Lanka report that material is being heated to produce the colorless material now that…
Market TrendsSoft holiday sales will not influence suppliers and diamond prices are expected to continue to rise. Store closings and bankruptcies are rising. Greater return memo hurting the industry. More sightholders…
Diamond MarketThis gemstone came to us for observation and an opinion of value. The loose gem did prove to be Paraiba tourmaline…
Gem NotesAn old European cut diamond in a ring setting came in for an appraisal. The approximate measurements were 5.00 x 4.90 x 2.59 with an estimated weight of .39 cts. At first observation, the diamond…
Gem NotesThis year’s AGA Tucson event tackled a series of treatment related issues through the kind of first class line-up of speakers and hands-on lab sessions that have come to define this annual event. The morning…
Featured ArticlesIn 2005, a Market Trends segment in the GMN tilted Andesine: The Next Paraiba? reported on the buzz building in the industry around this intensely red colored plagioclase feldspar appearing in the market in small quantities…
Featured ArticlesOn Friday February 8, 2008 the American Gem Trade Association (AGTA) in cooperation with the Jewelers Vigilance Committee (JVC) presented an important presentation on irradiated gems in the Leo Rich Theater on the grounds of…
Featured ArticlesIn the early days, there were the foil backs. These synthetic stones, often nothing more than glass, had a gold colored foil coating on the pavilion that theoretically made the stone look more diamond-like. The…
Featured ArticlesThe lead article discusses changes in the market for promotional diamonds. These charts that follow show the history of the subject diamond categories from 1995 to present. All prices shown are adjusted from the GemGuide…
Market Trends