Rhodochrosite is manganese carbonate (MnCO3). It forms a solid solution series with siderite (FeCO3) with iron substitution and with calcite (CaCO3) with calcium substitution. The name is from the Greek meaning “rose colored.” Rhodochrosite is…
Gem NotesThe market continues to experience healthy consumption of finer quality colored stones. As a result prices have yet to stable even as the industry moves into the typically slower summer months. Based on this it…
*Gem Focus & Market Pulse (Free Subscriber)Current market - Overview At the wholesale level of the colored stone market, dealers continue to express optimism as the industry gears up for the JCK Las Vegas show. In the U.S., demand is centered on…
*Gem Focus & Market Pulse (Free Subscriber)During the February Tucson gem show, Stuart Robertson spoke with renowned ruby and sapphire authority Richard Hughes about his latest undertaking—a laboratory focused on putting the “gem” back in gemology. What was the motivation for launching…
News ArchiveHigh energy radiation, likely gamma radiation, causes carbon atoms to be expelled from their lattice site into an interstitial site and this leaves a so-called “carbon vacancy” or simply “vacancy.” This vacancy of neutral charge…
Featured ArticlesThe general observation regarding the diamond market is that prices continue to edge up and are firm, while the trade and consumers remain cautious. There is a growing disconnect between the wholesale market and key…
Diamond MarketThe colored stone market is currently positioned for growth this year. Dealers have reported strong sales results at each of the major tests to date: Tucson, Hong Kong and Basel. Inspired by the trend, market…
Colored Stone MarketBusiness was strong for many of the 450 exhibitors at the fair this year which ran from March 19-22. Of great concern and conversation, was the crisis in Ukraine with Russia annexing Crimea at the…
Featured ArticlesThe colored stone market continues to move in a positive direction. Dealers have reported strong sales results at each of the major tests to date: Tucson, Hong Kong and Basel. Inspired by the trend, market…
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