Precious Coral in Jewelry: New Discoveries
Corals used in jewellery are commonly referred to as precious corals.
Featured ArticlesPondering on Clarity
Establishing value of a gemstone starts with correct identification; second logical step is grading but doesn’t end there.
Featured ArticlesEvaluating Clarity in Colored Gems
Have you ever been indecisive about the value of a colored gem? Made a bad deal? Lost money?
Featured ArticlesLab Grown Diamond Market
Although lab grown diamonds are certainly not a new product, they first appeared in mainstream jewelry as a curiosity, and prices were very high.
Featured ArticlesSea of Cortez Cultured Pearls
Cultured 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 ArticlesQuality Assessment of Natural Jadeite: Process and Tips for Appraisers
Most 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 ArticlesHeat Treatment Experiments of Corundum – Development of a Before/After Collection
Color 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…
Featured ArticlesThe Gemguide – Gem Market News – May/June 2020 Edition (All Articles)
Easy access to all articles from the The Gemguide May/June 2020 Edition.
Featured ArticlesProvenance of Pink Diamonds
Fancy colored diamonds are breaking all records at auctions for price paid per carat. Blue and red diamonds are considered the most expensive natural gems by weight in the world.
Featured ArticlesConsiderations to Valuing Colored Diamonds
The market for natural fancy color diamonds experienced substantial growth during the past two decades. This market expansion resulted from a combination of increased supply and a well-organized marketing campaign that grew consumer demand for previously less desirable grades and colors.
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