{"product_id":"diamond-tester-pen-gem-selector-portable-jeweler-tool","title":"Diamond Tester Pen Portable Gem Selector Jeweler Tool for Stones and Jewelry","description":"\u003cp\u003e\u003cstrong\u003eTell Real From Fake In Seconds — Portable Diamond Tester Pen for Gems, Stones and Jewelry Authentication\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSpot real diamonds from imitations on the spot with the Jowsie Diamond Tester Pen — a portable, battery-powered gem testing tool that uses thermal conductivity to identify diamonds vs glass, cubic zirconia, and other simulants. Press the probe against the stone, watch the indicator, and know immediately. A must-have for jewelers, pawn shops, gem collectors, and savvy shoppers at estate sales.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0675\/8930\/8586\/files\/ac6a7c51-cd4d-45b7-869a-a12a589d35f5.png?v=1780154715\" alt=\"Portable Diamond Tester Pen Gem Selector Tool\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy You'll Love This Diamond Tester\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstant Authentication\u003c\/strong\u003e: Identifies real diamonds in seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Conductivity\u003c\/strong\u003e: Detects diamonds vs glass, CZ, and other simulants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePortable Pen Design\u003c\/strong\u003e: Pocket-sized for jewelry shows, estate sales, and pawn shops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Powered\u003c\/strong\u003e: Ready to use anywhere — no plug required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudible \u0026amp; Visual Indicator\u003c\/strong\u003e: Beep + light tells you when a stone is diamond.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy To Use\u003c\/strong\u003e: Beginner-friendly with no special training.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0675\/8930\/8586\/files\/c11692b7-f493-459f-b03e-2ce34cb39772.png?v=1780154639\" alt=\"Gemstone jeweler testing kit pen tool\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type\u003c\/strong\u003e: Diamond \/ Gem Tester Pen\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod\u003c\/strong\u003e: Thermal conductivity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower\u003c\/strong\u003e: Battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicators\u003c\/strong\u003e: Audible beep + visual light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse\u003c\/strong\u003e: Loose stones and set jewelry\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhat's in the Box\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1 x Diamond Tester Pen\u003c\/li\u003e\n\u003cli\u003e1 x Battery\u003c\/li\u003e\n\u003cli\u003e1 x User Manual\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFAQs\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can it distinguish diamond from moissanite?\u003cbr\u003eA: Basic thermal testers may read both as diamond — a combination diamond\/moissanite tester is needed to tell them apart.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does it work on set jewelry?\u003cbr\u003eA: Yes — works on rings, earrings, and pendants if you can press the probe firmly on the stone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does it test colored gemstones?\u003cbr\u003eA: It's primarily designed for diamond authentication. Colored gem identification requires specialized testers.\u003c\/p\u003e","brand":"jowsie.com","offers":[{"title":"Default Title","offer_id":48360958918826,"sku":"SKU_1780154489106_521","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0675\/8930\/8586\/files\/ac6a7c51-cd4d-45b7-869a-a12a589d35f5.png?v=1780154715","url":"https:\/\/jowsie.com\/products\/diamond-tester-pen-gem-selector-portable-jeweler-tool","provider":"jowsie.com","version":"1.0","type":"link"}