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News and CommentsDiamond testers are portable devices that test thermal conductivity of diamonds. Diamonds are composed of pure carbon atoms linked by double bonds, resulting in extraordinary thermal conductivity that distinguishes them from other gem materials. Diamond testers are used for testing faceted gemstones to confirm they are genuine diamonds. Diamond testers have no use to test uncut diamonds (rough diamond crystals). That is because fake rough diamonds do not exist. In the gem trade, fakers will insert faceted gemstones composed of lesser materials into parcels of diamonds to increase the weight of the parcel and raise the value of the parcel. But the morphology (shape) of rough diamonds cannot be easily copied. And the value of rough diamond crystals is much less than faceted diamond gemstones. (This is the same reason currency counterfeiters fake $100 bills instead of $1 bills.) So fake rough diamonds do not exist. It is true that "glassies", the planar octahedral diamond crystals can be faked. But why bother? And the complex diamond crystals offered for sale on this site cannot be faked. If you are miner at Crater of Diamonds State Park in Arkansas, having a diamond tester is valuable for determining if the crystal you found is a genuine diamond. But the park service will test your finds and provide a certificate confirming it is genuine diamond. But when buying from a dealer, that has tested the diamond before selling it, then a diamond tester is not required. John H. Betts, 8/15/17 Click here to read past news and commentaries...
Customer Comments:"Thanks, John. The sapphire just arrived in fine shape. Very nice and the color and clarity were well-represented by your photographs. Another satisfied customer!" D.D. "An exceptionally beautiful fluorescent mineral expertly packaged and airmailed to me in perfect state. I am very thrilled with this purchase and plan many more." G. K. Tucker "Service above and beyond! Recently I placed an order for a beautiful set of 10 Boleite crystals only to find that the set had been sold. Not to worry, John offered to custom build a new set of 10 Boleites which were equally (or even more) impressive as the first set. My Boleites traveled across the US and got to me within a few short days. I am extremely pleased with my set of crystals. The look is fabulous with an eye-pleasing mix of cubes and "twinning" crystals. Thank you for your exemplary service John!" M. Parrott "We have, on several occasions, requested specimens that were not on your website. You have unfailingly come up with our requirements each time and they have all been top class :) We cannot thank you enough and look forward to dealing with you for a long time to come. Lots of thanks again :)" Marie "For the better part of this past year I've been searching for just the right "raw and natural" diamond for inclusion to my mineral collection. After searching many sites I found just the right diamond with John Betts. It is a reference example of a perfect octahedral gem and in my opinion the finest example John had in the under 1 carat range. My diamond is undamaged with no dark unsightly inclusions and is a cuttable gem-grade example. The service from John is exemplary and the shipping was extremely fast. I am pleased beyond 100%! My new diamond looks fabulous in my collection. John thoughtfully provided a circular - black cushioned display case with my order. Perfecto in every way. Now I will begin my happy dancing!!" Michael P.
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Pledge to My Customers:Customer satisfaction is my primary goal. I pledge:
John H. Betts, owner
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