In recent years, the obligation to fully disclose all gem treatments has changed from a mere ethical responsibility to a legal one.
Read MoreThe US Copyright Office granted what is believed to be the first copyright registration covering a gemstone design.
Read MoreSeveral gems were recently examined that showed stars with an unnatural appearance or an unusual number of rays.
Read MoreSynthetic moissanite is much closer to diamond in overall appearance and heft than any previous diamond imitation; this article reports on how to identify and characterise it.
Read MoreExamination of 51 colourless to near-colourless synthetic diamonds from all known sources of production confirms that they can be distinguished from similar-appearing natural diamonds on the basis of their gemmological properties.
Read MoreThe gemmological properties of a new ruby imitation, produced by dyeing natural colourless to pale-coloured corundum, are described.
Read MoreWhite, pink and black nontransparent synthetic "cubic zirconia" is currently being manufactured in Russia and marketed primarily in cabochon and bead form.
Read MoreThe Majorica S.A. product is remarkably similar in appearance to saltwater cultured pearls.
Read MoreLow levels of radioactivity were found in some greenish yellow to yellow-green (peridot-like) synthetic spinel-and-glass triplets, mirror-backed glass rhinestone chatons and fully fashioned glass rhinestones.
Read MoreMan-made malachite holds much promise for use in stone cutting and the jewellery trade.
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