Transparent colored gemstones are loved for their beautiful colors. How they absorb the visible light that passes through them determines their color (Figure 1). The study of light absorption by materials is called spectroscopy. Because…
Featured ArticlesLondon played host to a number of impressive events this year and the Gem-A 2012 conference with record attendance and delegates from over 20 countries, was no exception. Held in conjunction with the annual graduation…
Featured ArticlesAs we entered the new millennium, DeBeers announced that they had technology to invisibly mark the table of a diamond with anything from text to photographs. Using this focused ion beam technology, they branded and…
Diamond Market2012 was a great year for conferences. Gemworld was pleased to contribute to that with our third conference. Following a tradition that we started in 2008, every two years we are host to our own…
Featured ArticlesInterest in certain phenomenal gems could be enhanced by promoting the unique characteristics that materials in this category possess to the broader market. In general, the global market has significant potential to grow as emerging…
Featured ArticlesWe have only modest expectations for the holiday season. Less expensive gems such as garnet and quartz are the gems of choice this season offering more choices than just the big three. However, better commercial…
Colored Stone MarketIt's another late start to the holiday season. Diamond mining companies are reshaping how they do business and DeBeers will phase out the DTC brand among other strategies. Statistics out of Antwerp show mostly negative…
Diamond MarketAs with successful conferences of all genres, attendees look forward not only to interesting presentations, but also to interacting with colleagues from the far reaches of the globe with whom one can exchange ideas and…
Gem Market NewsAs technology marches forward so have techniques in the synthesis and treating of gemstones. Knowing how to identify these is of paramount importance to gemologists and valuers. This is why we possess the tools of…
Featured ArticlesWhen it comes to flux in ruby, there are some rather fundamental misunderstandings that are nearly uni- versal. They create a misperception of what is being done and why. The flux which is present in a…
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