Want to know if you are getting a real diamond or just a really well crafted piece of moissanite, the DiamondNite Diamond Moissanite Tester will tell you. Of course, unless you know how to pick a manufactured diamond from its naturally produced and chemically identical cousin, it won’t be a huge help.
I guess I will just have to keep to my policy of not buying diamonds.
Price: $199 [DiamondNite via Microkhan, BBG]

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