Konstantin Akinsha writes about the emerging Russian/East European art (s) + forgeries + other viewpoints @ http://artnews.com/issues/article.asp?art_id=2246
Gem and jewelry are good comparisons. Who can tell you whether the gem and jewelry you see on dispaly are real? Today experience + visual observations skills are not enough. Keeping up with fraudsters is difficult. They are always one step ahead. Most gemstones created in the laboratory, or enhanced by heat or chemical/special treatments are fine, but are not stated openly. In order to improve color, clarity + overall quality gemstones may be oiled, waxed, dyed, bleached, coated with lacquer or enamel, heat treated (with or without pressure), irradiated with neutrons, gamma rays or beta particles, surface diffused, glass/plastic filled (to add weight + toughen + hide surface/structural flaws), depending on the gemstone species. If you are doubtful always consult a reputed gem testing laboratory.
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