An alexandrite set in an 18K yellow gold ring with diamonds surrounding it, was sent to Gemworld for observation due to an unusual color stain in three separate fissures. The first task was to verify…
Gem NotesWe recently saw a GIA diamond grading report that noted a "new" inclusion in its Key to Symbols list - the etch channel. The etch channel, or etch tube as it is sometimes called, is…
Gem NotesFlux residue in ruby started to show up in the early to mid 1990s. The residue occurs when ruby, mostly from the Mong Hsu deposit in Burma, is heated to extreme temperatures. To protect the…
Gem NotesGemworld 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 NotesThis article was developed from information submitted by Jon Phillips, Corona Jewellry Company, Toronto, Canada. A diamond that the company acquired was only .18 carat but proved to have an inter- esting purplish red inclusion. The…
Gem NotesWhile these two stories are not related based on place of purchase, they illustrate the increasing prevalence of consumers being duped with false corundum purchases. The first is a sad story of how our military…
Gem NotesRecently, a client presented a 14KT white gold and three stone engagement ring seeking confirmation of the identification of the stones. The ring featured three round brilliant cut colorless stones set in four prong heads…
Gem NotesA recent inquiry regarding the use of ultrasonic cleaners with zultanite prompted research and uncovered answers and an update to this color change diaspore from Turkey. (See Gem Market News, July/August 2006 for an in…
Gem Notes