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THE ALL-NEW Presidium® Gem Tester II. WE ARE AN AUTHORIZED USA PRESIDIUM DISTRIBUTOR. The most trusted and sought-after colored gemstone tester has been. The industry's thinnest probe tip (0.6mm) for testing colored gemstones as small as 0.02ct.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.