Moissanite Common FAQ

Moissanite is a mineral form of Silicon Carbide (SiC). It’s extremely rare in its natural state (mostly in meteorites) and is usually produced in laboratories. It has many uses, but is known best as a diamond alternative. Wikipedia has a nice write up if you want to learn a little more.

First things first: Moissanite is not a diamond. Many people refer to is as a diamond simulant since it does not have the same material properties as a diamond (which is a mineral form of Carbon). Moissanite can be produced nearly colorless, has a Mohs hardness of 9.5, an a refractive index of 2.65; so slightly softer and more refractive than diamond. Moissanites are about 15%-18% lighter than diamonds so they cannot be sized based on weight (1ct, 1.5 ct). Instead, they are priced based on their measurements (6mm, 7.5mm).

Simulant: Stones that have similar optical characteristics as the gem that they’re imitating. Synthetic: Stones that are the exact same material properties as the gem.

It depends on your preference. For those who prefer a more white sparkle effect (like a diamond), a Hearts & Arrows Cut would be best as it minimizes the double refraction and has a less splintery effect compared to a standard Brilliant Cut. There are typically 8 distinct arrows and hearts in the pattern. If you want to maximize a moissanite’s fire and brillance, a Brilliant Cut is preferable. This cut has been described as having a discoball effect by some and is also splintery with its thin facets. See this video for a great comparison between the two cuts. An Old European Cut (OEC) is also a great choice if you prefer chunky facets with lots of soft pastel colors. Here is a comparison video between August Vintage’s Hearts & Arrows Round and Old European Cut Round in different lightings.

Working with Chinese vendors is the most affordable option for loose stones or complete rings. Out of the popular overseas suppliers here, you can expect Provence and Starsgem to be less expensive compared to Tianyu or Mona. Another option is to order loose stone(s) from a Chinese supplier and to purchase a Stuller setting (a widely used wholesaler for conventional settings). Most jewelers can order you one from their huge catalogue but make sure that they will be able to set the moissanite for you before committing. You can also buy second-hand (preloved) jewelry on Loupe Troop, Diamond Bistro or the Preloved Section at Pricescope (have to be logged in).