Rio Tinto recently unveiled a stunning new creation featuring pink and blue diamonds from the Argyle Mine. The Argyle Rose TM Ring features a 1.36-carat fancy deep pink radiant cut, a surround of blue diamonds from Argyle and 2.80-carats of white diamond “petals."
Last week the "Lion of Merelani," a spectacular 116.76 carat tsavorite garnet, was unveiled at the Smithsonian's National Museum of Natural History. This exquisite gemstone has been recorded as the largest tsavorite ever cut in the United States and the largest precision-cut tsavorite in the world.
Color is one of the most important factors in a diamond's overall beauty and value. When selecting a setting it's important to remember that the type of metal used can have a significant impact on how a diamond's color appears. White, yellow and rose gold settings can all affect how a diamond looks.
The IGI GemBlog has improved its position among thousands of blogs and websites, ranked by traffic, social media followers, domain authority & freshness according to Feedspot, the internet's largest human-curated database of bloggers.
Students of the Eugenio Montale Institute in Italy participated in a series of learning sessions involving gemstones and human values. Gemologist Francesco Sequino added his professional experience and insight on behalf of the International Gemological Institute.
The world's largest diamond cutting and polishing center exists in Surat, the second largest city in India’s Gujarat province. There are well over 5,000 cutting and polishing factories, ranging from family run businesses to many of the diamond industry's biggest players.
Australian mining company Lucapa has unearthed a 150 carat D color Type IIa rough diamond at their Lulo alluvial mine in Angola. Last year five rough crystals over 100 carats were recovered from the Lulo deposit, including crystals weighing 113, 131 and 160 carats in September alone.
IGI's grading laboratory and school of gemology in Antwerp, where the institute was first established in 1975, have been declared carbon neutral according to PAS 2060 standards by SCS Global Services (SCS), a world leader in third-party sustainability certification.
As lab grown diamonds gain popularity consumers have questions about the "post-growth treatment" comment seen on many IGI grading reports. Post-growth treatments are commonly used to reduce, eliminate or change the diamond's color-appearance. Logically, people want to know "are the treatments permanent?"
There are two sophisticated ways of producing lab-grown diamonds. One process assembles the diamond in vertical layers and the other uses a metal catalyst to dissolve carbon. These different approaches produce inclusions which differ from those seen in natural diamonds.