GIA researcher analyses and confirms that De Beers’ Lightbox diamonds are grown using the chemical vapour deposition process.
Read More
Details the process used by Wiede’s Carbidwerk to produce star synthetic corundum from the mid-1950s until the 1970s.
Read MoreExamines 85 saltwater natural pearls, reportedly harvested from the Caribbean islands off the coast of Venezuela during the early 16th century, to determine their age.
Read More
Results from GIA’s recent testing of a 10.08 ct blue HPHT synthetic diamond, the largest HPHT synthetic recorded to date.
Read More
Investigates the properties of synthetic zincite produced by industrial kilns in Poland.
Read More
An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.
Read MoreThe proper use and limitations of IR spectroscopy for identifying natural versus synthetic amethyst of various types have been investigated, focusing on the region 3800–3000 cm-1.
Read More
Examination of the largest HPHT synthetic diamonds GIA has examined so far demonstrated significant progress in this growth technology.
Read More
A review of Treasures and Talismans: Rings from the Griffin Collection at the Cloisters in New York.
Read More
A review of the “Maker & Muse, Women and Early 20th Century Art Jewelry” exhibition at Chicago’s Driehaus Museum.
Read More
