The Black Gem Challenge
Black stones have been in vogue for some time even sold as loose stones on the TV or Internet. See figure 1. While originally these may have been black diamonds set in expensive jewelry, we…
Featured ArticlesBlack Opal from Lightning Ridge, Australia
The best known localities for precious opal have long been Australia, although, among others, Mexico, several states in the west of the USA and Slovakia have yielded precious opal over the years. Only recently a…
Featured ArticlesIn The Land of Zultanite
The Milenyum Diaspore mine is the world’s only known deposit of gem quality Diaspore. The mineral diaspore is mined in many locations around the world, but no other are currently known that produce this beautiful…
Featured ArticlesGIT 3rd International Gem and Jewelry Conference
Thailand has been known as the center of colored stone trading for decades. Gem trading not only has a prominent role in Thailand’s economy but also influences the world gem and jewelry market. The Gem and…
Featured ArticlesPost-Conference Excursion to Ruby Mines in Thailand and Cambodia
Following the GIT Conference in Bangkok, a three day excursion visited legendary ruby mines in Chantaburi, Thailand and Pailin, Cambodia. This truly unforgettable experience of covering two countries within three days was a rare opportunity not…
Featured ArticlesThe Colors of Corundum
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 ArticlesGem-A Conference 2012
London 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 ArticlesWorld of Gems Conference III
2012 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 ArticlesEvaluating and Pricing Alexandrite
Interest 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 ArticlesDiamond Market
It'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 Market