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https://www.mineralab.com/JewelersEye/
The Jeweler's Eye, designed by respected gemologist Dr. William Hanneman, is a type of Relative Reflectometer. It essentially measures the amount of reflection or luster of a gemstone relative to other gems, and reads out that reflectivity on a scale that is calibrated not only numerically, but by the variety of gemstone as well.Brand: Mineralab
https://www.gemsociety.org/article/what-is-a-reflectometer/
A reflectometer, sometimes called a jeweler’s eye, measures luster, how a gem’s surface appears. What a Reflectometer Can (and Can’t) Do. A reflectometer is usually calibrated to tell you what a stone “most likely” is. For example, if you’re looking at a ruby, a reflectometer will quickly tell you if the gem is not corundum. However, that is far from what you need for positive gem identification.
https://www.mineralab.com/Gem-n-Eye.htm/
Therefore, the Gem-n-Eye measures the full range of RI values, between 1.300 and 3.300, from low ranging Fluorite and Glass, then through the primary Colored Stone range, all the way up to and beyond high-index Diamond, including its many simulants such as CZ, Moissanite, etc. Likewise, the Gem-n-Eye can also measure certain garnets including Demantoid and high Spessartines and Almandines, along …5/5(6)
https://www.kruess.com/gemmology/products/gemstone-refractometers/
To classify and quality control gemstones, a refractometer is normally employed. The equipment measures the Refractive Index (RI) and Birefringence, by passing light through the stone, which refracts out at a defined and consistent angle. The RI is an important parameter in classifying a …
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?t=23262
Nov 21, 2016 · The "Jewellers eye" works on reflectivity, which is related to refractive index. Again, hardly accurate enough for precision gemmology. It is interesting to note that early models had a scale of R.I. but later models were marked with bands showing expected values.
https://www.amazon.com/jewelers-eye/s?k=jewelers+eye
2 Packs Jewelers’ Loupe, 30X 60X 90X Illuminated Jewelers Eye Loupe Magnifier, Portable Loupe Magnifier with UV Black Light for Jewelry, Coins, Gems, Stamps. 4.4 out of 5 stars. 546. $12.99. $12. . 99. FREE Shipping on orders over $25 shipped by Amazon. Only 6 left in stock - order soon.
https://www.amazon.com/Best-Sellers-Arts-Crafts-Sewing-Jewelry-Loupes/zgbs/arts-crafts/8090802011
Jewelry Loupes, DREAMZE 30X 60X 90X LED Lighted Illuminated Jewelers Eye Loupe Jewelry Magnifier for Gems Jewelry Rocks Stamps Coins Watches Hobbies Antiques Models Photos - Black 4.2 out of 5 stars 947. 1 offer from $6.99 #21.
https://www.ebay.com/b/Jewelry-Loupes-Magnifiers/34084/bn_16563322
Total Ratings 150, $9.55 New. 30x 60x Magnifying Loupe Jewelry Jewelers Pocket Magnifier Loop Eye Coins LED. 4 out of 5 stars. (456) Total Ratings 456, $7.39 New. 8pc Jewelers Eye Loupe Set 30x Dual 10x-20x Magnifying Glass Ships FR USA. 4.7 out of 5 stars.
https://goexporting.com/easylux-mini-reflectometer-for-horizontal-road-markings/
Jul 09, 2021 · This innovative Reflectometer is an up to four angle retroreflectometer designed to accurately measure the retroreflection RA of road signs, safety clothing and other materials. optical measurement system is the result of 10 years of lateral thinking and development by a dedicated engineering team. Forget the big, bulky systems of the past, the patented Easylux Mini Reflectometer …
https://www.walmart.com/ip/Insten-60x-Magnifying-Magnifier-Glass-Jeweler-Eye-Jewelry-Loupe-Loop-LED-Light-Pocket-Professional-Microscope-with-Leather-case/28889983
Jeweler's magnifying glass is the ideal tool for the jeweler, watchmaker and coin or stamp connoisseur; Adjustable LED light for better illumination; Loupe can be adjusted on the eyeglass frame; Wide view is ideal for watch repairing and inspecting jewelry, stamps, coins, notes and more; Includes a leather case to protect your magnifying glass3.5/5(68)
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