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Find the best diamond tester for sale at Gemtrue.com. We offer a wide range of diamond testers and other gemological tools at affordable prices. If you’re looking for a high-quality diamond tester pen, you are at the right place. Scroll through our assortment of diamond tools and find the diamond moissanite tester that suits your personal needs. All our testers use advanced technology and hardware that treat you to an accurate reading. They have been crafted out of high-end material and come packaged in a premium leather case. No matter if you’re looking for a diamond tester, moissanite tester, multi-tester or CVD tester - GemTrue has it all.