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Qualified gemologist info please - IGS Forums Hello everyone, i am looking to find out if the certificate of qualified gemmologist that you can earn from I G S, is recognised as a qualification world wide and is respected by the international gems societies? i am currently working my way through the mini courses, before i plunge in for the big one, to become a fully qualified gemologist, can any one advise me please thank you all
Seeking Skilled Faceters for Sphene Emerald (Tampa Bay Area) Hello IGS Community, I’m looking to connect with professional gem faceters based in the Tampa Bay region who specialize in cutting sphene (titanite) 🌟 About the Rough Stones Sphene (titanite) — vibrant, facet-grade rough
Alexandrite testing - Gem Related Discussion - IGS Forums Hi Julie, The IGS Refractive Index list indicates Spinel can also have a R I = 1 74; therefore, it cannot be ruled out at this point The PRI-M from Presidium is an interesting instrument It can measure the indicated R I of a stone But it has some limitations as it is difficult to measure the birefringence optical sign response
Crystal Opal Backing - Gem Related Discussion - IGS Forums Crystal and “white” opals usually look better on a black background Some jewelry with these opals has a black backing to better show the colors I don’t mean making an opal doublet but applying a something to the stone’s rear surface What materials are commonly used for this and how are they applied? Is this considered treatment?
Emerald Colours - Gem Related Discussion - IGS Forums I’m sorting through an old Ex Jewellers collection of Zambian stones and I’m coming across the odd one that is much more blue than green See the stone 3rd from left on second row Is this still considered an emerald? The largest stone in the image is 92 cts When is an emerald not an emerald? Many thanks for your kind knowledge