Choosing between diamond and moissanite is one of the biggest decisions you will face when designing an engagement ring. Both are beautiful, durable, and well-suited for everyday wear — but they differ in origin, appearance, cost, and values. This guide gives you an honest, side-by-side comparison so you can make the choice that is right for you.
What Is Moissanite?
Moissanite is a lab-created gemstone made of silicon carbide. It was first discovered in 1893 by Nobel Prize-winning chemist Henri Moissan in a meteorite crater — which is why it is sometimes poetically called "the gem from the stars." Today, moissanite is grown in laboratories using advanced technology, producing stones with remarkable optical properties.
Brilliance and Fire
This is where moissanite actually outperforms diamond. Moissanite has a higher refractive index (2.65 vs. diamond's 2.42), which means it bends light more and produces more fire — those rainbow flashes you see when light hits the stone. Diamond produces more white brilliance, while moissanite leans toward colorful fire.
In practice, both look stunning. The difference is most noticeable in larger stones and under certain lighting. Some people prefer moissanite's extra fire; others prefer diamond's more subdued sparkle. Neither is objectively "better" — it comes down to personal taste.
Durability
Diamond is the hardest natural material on Earth, scoring 10 on the Mohs hardness scale. Moissanite scores 9.25 — making it the second hardest gemstone used in jewelry. Both are more than durable enough for daily wear on an engagement ring.
Cost Comparison
A 1-carat natural diamond of good quality typically costs $4,000-$8,000. A comparable lab-grown diamond costs $1,500-$3,500. A comparable moissanite costs $300-$600. This means you can get a significantly larger moissanite stone — or allocate more budget toward the setting and metal.
Ethics and Sustainability
Both lab-grown diamonds and moissanite are created in controlled laboratory environments, eliminating concerns about mining practices and conflict sourcing. Natural diamonds can also be ethically sourced through certified channels. At Omour, every stone is ethically sourced and fully traceable.
Can People Tell the Difference?
To the naked eye, most people cannot distinguish moissanite from diamond. Jewelers can tell using specialized equipment. In everyday life — at dinner, at work, in photos — no one will know unless you tell them.
Which Should You Choose?
Choose natural diamond if: You value tradition, rarity, and prestige. Budget is flexible.
Choose lab-grown diamond if: You want a real diamond with ethical sourcing and better value.
Choose moissanite if: You want maximum brilliance, ethical origin, and the best value.
See Both Options at Omour
At Omour, every custom engagement ring is available with natural diamonds, lab-grown diamonds, or moissanite. Our Ring Builder lets you compare options side by side. Explore our diamond and stone collection to start your search.