Determining pricing for treated diamonds can be a great challenge. The focus here is on the history and pricing trends of modern-day diamond treatments. Four are in this group including laser drilling, clarity enhancement, high pressure high temperature (HPHT), and irradiation.
Featured ArticlesFor our series on innovators in jewelry design, this month we are focusing on multiple AGTA award winning artist, gem cutter, metalsmith, and gemologist Derek Katzenbach owner of Katzenbach Designs. Located in Maine, it came as no surprise that Derek has a special passion for working natural Maine tour- maline.
Featured ArticlesIn light of the recent announcement that the Gübelin Gem Lab would introduce a rating system for gemstones, which is admittedly influenced by the process in use for wine, it seems appropriate to examine the potential implications for our industry, but from the context of the wine industry, where the pros and cons of such systems are known.
Featured ArticlesCorals used in jewellery are commonly referred to as precious corals.
Featured ArticlesEstablishing value of a gemstone starts with correct identification; second logical step is grading but doesn’t end there.
Featured ArticlesHave you ever been indecisive about the value of a colored gem? Made a bad deal? Lost money?
Featured ArticlesAlthough lab grown diamonds are certainly not a new product, they first appeared in mainstream jewelry as a curiosity, and prices were very high.
Featured ArticlesCultured Cortez Pearls have been gaining a larger share within the global cultured pearl market thanks to successful pearl farming operations in the Gulf of California, aka Sea of Cortez in recent years. Indigenous cultures of…
Featured ArticlesMost retailers and appraisers in the Western World lack the knowledge to judge the quality parameters and value of natural untreated jadeite. This is because natural jadeite material in all qualities is scarce in the western marketplace, and because they lack literary references to rely upon.
*Free Featured ArticlesColor modification of ruby and sapphire by heat treatment processes has a long tradition in the gemstone industry. First written reports by Bhojarajah and Al Beruni date back to the 11th century (see Hughes, 2017),while…
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