Barbra over at Gemologyonline made a post recently that reminded me a an important article that I forgot to post about, so here it is, better late then never!
This spring, the New York laboratory examined a 17.02 ct reddish orange spinel that contained a few small expansion halos or “blebs” emanating from strings of minute inclusions. The appearance of the inclusions suggested the stone was of natural origin — but may have been heat treated.
Read entire GIA Article HERE.
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Well, as many know there is lots of work being done with “jeweler’s” silicas, aka man-made glass for jewelery usage, and they are now matching colors with Refractive Index to simulate certain natural stones, and with RI’s ranging in the 1.54-2.1 range, they can simulate almost any gemstone out there!
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This 1.05 ct pear shape (9.81 x 5.95 x 3.06 mm) was color-graded as equivalent to G. In addition to pinpoint inclusions, it contained some feathers and fractures along the girdle, and its clarity grade was equivalent to I1.
Well, this will make things a bit more difficult in determining whether a diamond is natural or synthetic. So, folks, pay some very close attention to your diamonds you get in to ID and/or appraise, this could be a very costly mistake! “If in doubt send it out!™” I doubt these are saturating the market currently in large numbers, but it more then likely will not be long until they are!
Check out the Full Article HERE
First off please be sure to take the Gem-Metrics Poll on the lower right of the website, thank you very much.
Secondly, this is an unusual announcement considering the last thing heard was a bid to buy another TV show, but
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First off let me start by showing the image that started the online flaming and arguments towards myself for posting it. I do need to add that technically my initial description of the image was actually not totally correct!! Instead of calling it a picture showing the fracture filling of a hessonite garnet, I technically should have called it an image showing the partially filled fracture of a hessonite garnet.
Partially filled fracture
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ISG releases a new newsletter with smoking gun proof of the treating of blue tourmaline. They are calling this treatment “dyefusion”.
The entire article/newsletter with full details and pictures can be seen HERE.
Thomas Hainschwang with Gemlab Gemological Laboratory announced that he recently examined and tested three(3) Emeralds that were purchased in India. The stones were reportedly guaranteed by the Seller to be completely natural and untreated Emeralds. The stones were translucent, green in color as one would expect, and full of fibrous inclusions. When examined under a microscope Hainschwang reported that these stones were not full of fibrous inclusions but, instead, actually had a fibrous structure! It was also noted that the green coloring was concentrated within this fibrous structure. This of course indicates that the material is dyed and not an Emerald.
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AGTA ePrism Nov 4, 2009 issue announces the 2010 Board of Directors election results. We add our GemAddicts congratulations. There are a wide variety of subjects in this issue from the Hope Diamond to the latest fashion colors.
Read full issue here
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