{"product_id":"dr-hanneman-diamond-eye-reflectivity-meter-c-1978","title":"Dr. Hanneman Diamond Eye Reflectivity Meter (c.1978)","description":"\u003cdiv class=\"n6owBd awi2gc\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAAIDRAA\" data-complete=\"true\" data-processed=\"true\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAAIBxAA\" data-complete=\"true\" data-processed=\"true\"\u003eThe Diamond Eye Reflectivity Meter\u003c!--TgQPHd|||[]--\u003e\u003c!--TgQPHd|||[[[null,null,null,null,null,null,null,null,null,null,null,null,[247864,null,0]]]]--\u003e stands as a landmark artifact in the history of democratized gemology, embodying the lifelong mission of its creator, Dr. William Hanneman\u003c!--TgQPHd|||[]--\u003e. Known globally as a pioneering champion of \"affordable gemology,\" Dr. Hanneman fiercely advocated for developing accessible, practical testing tools that would strip away the prohibitive financial barriers of the trade. Released commercially in the late 1970s with an initial list price of $149.00 USD\u003c!--TgQPHd|||[]--\u003e, the compact, 9-volt battery-powered instrument quickly became a beloved fixture for field researchers, hobbyists, and dealers. Dr. Hanneman published his definitive findings on the technology in his April 1978 paper, \"The role of reflectivity in gemmology,\" in the Journal of Gemmology. His revolutionary contributions—which prioritized utility over complex machinery—ultimately earned him the prestigious Antonio C. Bonanno Award for Excellence in Gemology from the Accredited Gemologists Association (AGA), cementing this specific device's status as a symbol of educational empowerment.\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\" data-processed=\"true\" data-sfc-inited=\"2\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv role=\"heading\" aria-level=\"4\" data-animation-nesting=\"\" data-sfc-cp=\"\" data-wiz-attrbind=\"aria-level=q3LmJe_x\/fLk2Md\" data-sfc-root=\"c\" data-hveid=\"CAAICBAA\" data-complete=\"true\" data-processed=\"true\" data-sae=\"\"\u003e\n\u003cbr\u003e\u003c!--TgQPHd|||[[2,[null,null,1,null,null,null,null,null,null,null,null,null,[351768,null,0]],[],null,1]]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAAICRAA\" data-complete=\"true\" data-processed=\"true\"\u003eAt its scientific core, the Diamond Eye functions as a highly specialized digital reflectometer rather than a traditional optical refractometer. It operates on the principle that every gemstone material possesses a unique relationship between its Refractive Index (R.I.) and its surface luster, which dictates how much light it reflects. Equipped with an internal infrared light source\u003c!--TgQPHd|||[]--\u003e, the device aims a precise beam at the facet of a gemstone placed on its staging platform. By reading the amount of light that bounces off the surface and registers against its photo-detector, the meter bypasses the traditional limitations of optical refractometers—which cannot measure stones with an R.I. exceeding 1.81. Consequently, it allows gemologists to safely and instantly distinguish genuine diamonds from high-refractive simulants like YAG (yttrium aluminum garnet), Cubic Zirconia (CZ), zircon, and synthetic spinel, as well as highly sought-after varieties like Paraiba tourmaline.\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\" data-processed=\"true\" data-sfc-inited=\"2\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv role=\"heading\" aria-level=\"4\" data-animation-nesting=\"\" data-sfc-cp=\"\" data-wiz-attrbind=\"aria-level=q3LmJe_11\/fLk2Md\" data-sfc-root=\"c\" data-hveid=\"CAAIChAA\" data-complete=\"true\" data-processed=\"true\" data-sae=\"\"\u003e\n\u003cbr\u003e\u003c!--TgQPHd|||[[2,[null,null,1,null,null,null,null,null,null,null,null,null,[351768,null,0]],[],null,1]]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAAICxAA\" data-complete=\"true\" data-processed=\"true\" aria-owns=\"action-menu-parent-container\"\u003eOperating the Diamond Eye requires an adherence to shielding and careful calibration to ensure diagnostic accuracy. The workflow begins by placing a known reference stone, such as synthetic spinel or quartz, table-facet down onto the localized Gemstone Platform\u003c!--TgQPHd|||[]--\u003e directly over the central \"Optical Eye\". Using the manual rotary Calibration Knob\u003c!--TgQPHd|||[]--\u003e, the user adjusts the interface needle until it aligns perfectly with the designated benchmark on the auxiliary scale. Once calibrated, the unknown gemstone is cleaned and centered over the optical sensor. To prevent ambient room lighting from corrupting the infrared readings, the operator places the included light shield—or a cupped hand—completely over the stone. Pressing the red Test button\u003c!--TgQPHd|||[]--\u003e engages the infrared beam, causing the analog needle to smoothly sweep across the dial to reveal a relative reflectivity value that immediately unmasks the specimen's identity.\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-os-fs=\"\" aria-hidden=\"true\" tabindex=\"0\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv data-os-fs=\"\" aria-hidden=\"true\" tabindex=\"0\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\" data-processed=\"true\" data-sfc-inited=\"2\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAAIDBAA\" data-complete=\"true\" data-processed=\"true\" data-sfc-inited=\"2\"\u003e\n\u003cdiv data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAAIDBAB\" data-complete=\"true\" data-processed=\"true\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Gems.studio","offers":[{"title":"Default Title","offer_id":68055519592768,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/0397\/2672\/files\/DiamondEye_1.avif?v=1794094539","url":"https:\/\/gems.studio\/products\/dr-hanneman-diamond-eye-reflectivity-meter-c-1978","provider":"Gems.studio","version":"1.0","type":"link"}