Observing it through the naked eye, it is very hard to distinguish a moissanite diamond from a diamond. It is a scarce gem that has qualities like those of a diamond. Moissanite is a crystal of the mineral composition of silicon carbide that exists by nature. It was first found in 1893 by French chemist, Henri Moissan, while studying stones in a meteor crater. The crystal, which he at first confused for diamonds, was later named after him.
In fact, some stones have passed for diamonds under professional scrutiny. It compares closely to diamonds in terms of color, brilliance, and hardness. Moissanite has a color similar to GIA certified K-color diamond, a hardness score of 9.25 (a diamond is a 10), and it sparkles more than a diamond.
The rainbow sparkles produced by moissanite are nicer than those of diamonds, but the two gems are very distinct. One sure way to distinguish between a diamond and moissanite is to test their electrical conduction properties. A moissanite is a good electrical conductor but a diamond is not. It is also twice as refractive as diamond.
Although a moissanite diamond looks as brilliant as a diamond, its value is considerably less, with a diamond costing 7 times or more than a moissanite diamond. However, the units to determine the value of a moissanite diamond is different than that of a diamond, with a diamond being valued by carat weight and a moissanite diamond being measured by millimeters.