The Nexus Diamond alternative is made of a proprietary substrate and will not test as a natural diamond.

The moissanite gemstones we offer are exclusively lab created. Moissanite gemstones are colorless (graded D, E, or F), of high clarity (VS1 or better), and are manufactured to an Excellent Cut, Polish and Symmetry.

Key Takeaways. Moissanite offers a more affordable alternative to diamonds for engagement rings, with similar durability and greater brilliance and fire. While diamonds score a perfect 10 on the Mohs scale of hardness, moissanite is close behind with a score of 9.25, making both stones exceptionally durable.

If you're serious about finding out whether your diamond is real or fake, you can put the stone through a fire test. Use a lighter to light the stone for approximately 30 seconds, before dropping it in cold water. If it's a real diamond, the stone will remain unharmed, but if it's fake, it will shatter to pieces.