{"product_id":"professional-1-30-1-81-gemstone-jewelry-refractometer-jade-emerald-identification-device-with-led-flashlight","title":"Professional 1.30-1.81 Gemstone Jewelry Refractometer Jade\/Emerald Identification Device with LED Flashlight","description":"\u003cp\u003e\u003cb\u003eStructure of Gemstone Refractometer:\u003c\/b\u003e\u003cbr\u003e- The gemstone refractometer mainly consists of a high refractive index prism (lead glass), a prism reflector lens, a scale (inner or outer scale), and an eyepiece.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eWorking Principle:\u003c\/b\u003e\u003cbr\u003e- The working principle of a refractometer is based on total internal reflection. The instrument measures the critical angle of a gemstone and directly converts the reading into a refractive index value.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eThe Conditions for Generating Total Reflection:\u003c\/b\u003e\u003cbr\u003e- The high refractive index prism of the refractometer must be an optically dense medium.\u003cbr\u003e- The gemstone to be tested is a light sparse medium.\u003cbr\u003e- Contact the liquid to establish good optical contact between the prism and the gemstone being tested.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003cbr\u003e- Large eyepiece design; Comes with a polarizing lens (for dimming), providing comfortable viewing and bright and clear effects.\u003cbr\u003e- Stainless steel table-board; Made of metal stainless steel material, it is scratch resistant, durable, and corrosion-resistant.\u003cbr\u003e- ABS power switch; ABS insulation material prevents power leakage and unnecessary damage.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cbr\u003e- Product size: 6 x 11 x 3.4cm\u003cbr\u003e- Net weight: 326.3g\u003cbr\u003e- Material: metal material, optical glass\u003cbr\u003e- Accuracy: refractive index accurate to 0.01\u003cbr\u003e- Function: authenticity identification through refractive index\u003cbr\u003e- Eyepiece diameter: 1.6cm\u003cbr\u003e- Measurable range: refractive index within 1.30-1.81\u003cbr\u003e- Table: low dispersion high hardness glass table\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Included:\u003c\/b\u003e\u003cbr\u003e- 1 x Refractometer\u003cbr\u003e- 1 x Magnifier\u003cbr\u003e- 1 x External Flashlight\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105002\/105002-01.jpg\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Thanksbuyer","offers":[{"title":"Default Title","offer_id":41225368961073,"sku":"105002","price":64.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/4790\/6353\/files\/20260912161232_50d16ea9.jpg?v=1789353315","url":"https:\/\/www.thanksbuyer.com\/ko\/products\/professional-1-30-1-81-gemstone-jewelry-refractometer-jade-emerald-identification-device-with-led-flashlight","provider":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products,  Audio Amplifer and Decoders","version":"1.0","type":"link"}