Most articles comparing moissanite and diamond are written for American buyers shopping in USD, living in low-humidity climates, and shopping from brands that have no context for Indian weddings, Indian pricing, or what the Bureau of Indian Standards now requires jewellers to disclose. This one is written for you.
Here is what actually matters.
Where moissanite came from (this part is genuinely interesting)
In 1893, French chemist Henri Moissan was examining rock samples taken from an Arizona meteorite crater. He found crystals he believed were diamonds. They weren't. What he had discovered was silicon carbide (SiC), a mineral so rare on Earth that it is considered essentially extraterrestrial in origin. Later analysis of the Murchison meteorite found that silicon carbide grains in meteorite rock originate from carbon-rich stars outside our solar system. Moissan was awarded the Nobel Prize in Chemistry in 1906, partly for this discovery.
The gemstone named after him was formally classified as a completely separate mineral species, not a diamond substitute or an imitation. It has its own molecular structure, its own physical properties, and its own optical behavior.
All moissanite sold in jewellery today is lab-grown. Natural moissanite deposits are too small and too scattered to mine commercially. This is not a flaw. It means every moissanite stone comes from a controlled manufacturing environment, with no mining involved.
The science, without the marketing
Three measurements determine how a gemstone performs in real life: hardness, brilliance, and fire.
Hardness (Mohs scale) measures scratch resistance. Diamond scores 10. Moissanite scores 9.25. Cubic zirconia scores 8. Sapphire and ruby both score 9. In practical terms, moissanite is harder than every gemstone you will encounter except diamond. It won't scratch from contact with keys, bags, or everyday surfaces.
Refractive index determines how much light bends when it enters a stone, which produces the sparkle effect. Moissanite's refractive index is 2.65 to 2.69. Diamond's is 2.42. By this measurement, moissanite is technically more brilliant than diamond.
Dispersion (fire) creates the rainbow color flashes you see inside a stone. Moissanite's dispersion value is 0.104. Diamond's is 0.044. Moissanite produces 2.4 times more color dispersion than diamond. Under bright lighting, at a wedding, in afternoon sun, this is visible. The stone throws more color. Some people love this. Others prefer diamond's subtler fire. Neither is wrong. But they are different, and worth knowing before you buy.
A quick comparison
What the 2026 BIS regulations say
In January 2026, the Bureau of Indian Standards issued standard IS 19469:2025. This regulation formally defines a diamond as a naturally formed carbon crystal, separating it in Indian law from lab-grown diamonds, moissanite, and other synthetically created stones. Any certified retailer is now legally required to accurately label these on certificates and invoices.
This matters for buyers because it removes ambiguity. You should be able to ask your jeweller for documentation that specifies exactly what stone you are buying. If they can't produce it, that is useful information.
The IGI (International Gemological Institute) is the most common certification body for moissanite and lab-grown stones in India. Ask for an IGI report or equivalent.
Who should actually choose what
Choose moissanite if you want maximum brilliance, a stone harder than sapphire and rubies, zero ethical concerns about mining, and a price that doesn't require you to lock the piece away.
Choose a lab-grown diamond if the diamond-specific look matters to you, you want something chemically identical to natural diamond, and the 5 to 8x higher price over moissanite fits your plan.
Choose a natural diamond if the geological origin story and market value are part of what you are buying. Natural diamonds carry the weight of rarity, and for some people, that meaning is part of the purchase.
There is no correct answer here. But the choice should be yours, made with full information.
Frequently asked questions
Is moissanite the same as cubic zirconia?
No. Cubic zirconia is zirconium dioxide, scores 8 on Mohs, and clouds over time. Moissanite is silicon carbide, scores 9.25, and retains its optical properties permanently. They are different minerals with different physical structures. The confusion comes from both being non-diamond stone options, but the performance gap between them is significant.
Can someone tell moissanite apart from a diamond with the naked eye?
Most people cannot under normal conditions. A trained gemologist can distinguish them using a moissanite tester or a loupe, because moissanite shows a characteristic doubling effect under magnification. The visible difference to the naked eye comes mostly in very bright or direct light, where moissanite's higher fire produces more rainbow flashes than diamond.
Will moissanite lose its sparkle over time?
No. Silicon carbide's optical properties are permanent. It won't cloud, yellow, or fade with age. Cleaning with mild soap and warm water fully restores its surface.
Does moissanite come with certification?
Yes. Look for a GRA certificate or equivalent from a recognized gemological lab (Global or Local). You can always take your jewellery to any equipped testing lab near you to get a certificate as well.
Is moissanite a good choice for an everyday ring in India?
Durability-wise, yes. At 9.25 on Mohs, it handles daily wear. Whether it works socially depends on who you're buying for and what they value. Some women care about the sustainability or practicality; others care about the cultural associations of the diamond. Worth having that conversation before you buy.
Myraé's moissanite collection is built on 925 sterling silver settings with certified stones. If you want to see how they look in real light, browse the collection or reach out to us directly.