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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.
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JARLINK 2 Pack LED Slide-Out Jewelers Loupe, 10X 20X 30X Illuminated Multi-Power Jewelers Eye Loop Magnifier with UV Black Light for Gems, Jewelry, Coins, Stamps, etc (Black) 4.1 out of 5 stars 122. $12.99 #25. KINGMAS Pocket Jewelry Loupe 30x 21mm Jewelers Eye Magnifying Glass Magnifier
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(5)
https://www.amazon.com/Gemologists-Dichroscope-Spectroscope-Polariscope-Refractometer/dp/B00AR9RQ4M
Ade Advanced Optics Travel Labs are perfect for the jeweler on the go! these travel labs come equipped with the tools and accessories needed to inspect and analyze gemstones and jewelry. Including 17+ tools 1.UV+LED 10x Triplet 2.30x Triplet 3.60x Measuring Microscope 4. White White lightsouce for 60x Measuring Microscope 5.3.8/5(14)
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Jeweler's Eye Loupe with dual swing-down lenses for 16.5x magnification. Lenses may also be used individually for 3.3x and 5x magnifications, respectively. The spring-loaded clip attaches to the side of your eye glasses. 1" diameter lenses. Great magnifier for jewelry-making…Reviews: 48
https://www.amazon.com/Gemological-Gemstone-Gem-Refractometer-Built/dp/B000XACSOS
The primary use of the refractometer is to measure the angle at which light traveling through the stone is bent or refracted. This is called Refractive Index (R.I.). As Refractive Index is usually different for different gemstones, this provides an important clue for accurate gemstone identification. Gemological refractometer also can be used to determine whether or not a stone is single or double refracting.Reviews: 36
https://www.gemsociety.org/article/tools-for-gemology/
Jeweler’s Eye. There’s an instrument called a “jeweler’s eye” or reflectometer that measures luster. It was designed for traveling professionals who need portable instruments, not beginners. Diamond Detector. If your work requires you to identify small stones in settings, a diamond tester is a necessity. Small, dirty, low-quality diamonds are impossible to distinguish with the naked eye.
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.
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