Gemworld received this yellow stone for identification from a jeweler. Our first instinct was that the greenish yellow color was "unnatural." However, this color is rare but possible in nature and as always, full gemological…
Gem NotesGemworld International, Inc. recently received an antique gold ring for appraisal. The ring is set with a cushion shape, transparent, brownish stone displaying very high luster and prominent fire, almost iridescent looking. It is surrounded…
Gem NotesThis item came in for a quick valuation for sale as scrap along with several other items of gold and diamonds. When the jewelry is all of high quality and high value, one has a…
Gem NotesA new era begins for the diamond industry as ownership of mines changes hands. Huge increases in prices in the first half of 2011 show no signs of any correction and remain high despite average…
Diamond MarketThe jewelry holiday season started with better than expected results. In bridal jewelry, the trend is to use more color, specifically sapphire and ruby. Tanzanite is regaining popularity with renewed interest. Untreated corundum prices are…
Colored Stone MarketDr. Jeffrey Post, Curator of the mineral collection at the Smithsonian Institute, was the ideal choice for the opening lecture. His stunning images of some of the incredible specimens housed at the Smithsonian were capable…
Gem Market NewsSeveral factors have contributed to the rise in unenhanced ruby prices over the last decade. Worldwide demand has been high with the well-publicized surge in recent years from emerging markets such as China and India…
Market TrendsIn the last issue of the Gem Market News, we printed an article by Richard Hughes, titled Faith: In Search of the Lost Andesine Mines. Hughes is a respected author and gem expert who has…
Gem Market NewsDiffusion in gemology can be defined as a method of artificially coloring gemstones, not unlike the dyeing of cloth. Diffusion is actually a very common process that we meet in many different contexts. The dying of natural…
*Free Featured ArticlesA simple Rolex watch can be an easy assignment once authenticated, by simply looking up the replacement value.
The Appraiser's Notebook