Moissanite Buying Guide: The Diamond Alternative You Need to Know

If you've been exploring alternatives to diamonds, moissanite is almost certainly on your radar. With its extraordinary brilliance, impressive hardness, and accessible price point, moissanite has become one of the most popular gemstone choices for engagement rings and fine jewellery. But what exactly is moissanite, how does it compare to a diamond, and is it the right choice for you? This comprehensive guide has everything you need to know.

What Is Moissanite?

Moissanite is a gemstone made of silicon carbide (SiC) first discovered in 1893 by Nobel Prize-winning French chemist Henri Moissan in a meteor crater in Arizona. Natural moissanite is incredibly rare — almost all moissanite on the market today is lab-created, ensuring ethical sourcing and consistent quality. Although moissanite is not a diamond, it is not an imitation either. It is its own unique gemstone with distinct properties that in some respects actually surpass those of a diamond.

Brilliance and Fire: Where Moissanite Shines

Moissanite has a refractive index of 2.65–2.69, compared to a diamond's 2.42. This means moissanite refracts more light than a diamond, producing even more sparkle. Moissanite also has a higher dispersion rate (0.104 vs 0.044 for diamonds), producing significantly more fire — those colourful rainbow flashes of light. Some people love this spectacular display; others prefer the slightly more subdued fire of a diamond. It comes down entirely to personal taste.

Hardness and Durability

Moissanite is the second hardest gemstone after diamond, scoring 9.25 on the Mohs scale compared to diamond's 10. In practical terms, this makes moissanite extremely resistant to scratching and very suitable for everyday wear, including engagement rings. It will not chip, scratch, or dull with normal daily wear — making it a lifetime stone.

Colour Options

Early moissanite sometimes showed a slight yellow or grey tint under certain lighting, which put some buyers off. However, modern lab-created moissanite has largely overcome this. Today's moissanite is available in colourless grades (equivalent to D–F diamond range), near-colourless grades, and even fancy colours including green, blue, grey, and yellow. Premium colourless moissanite looks nearly identical to a top-grade diamond.

Price: Dramatically More Affordable

Moissanite is dramatically more affordable than diamonds. A 1.00ct equivalent moissanite typically costs $300 to $600, compared to $4,000 to $8,000 for a natural diamond of similar appearance. This price difference allows buyers to opt for a much larger stone, a more elaborate setting, or simply invest their savings elsewhere — all without compromising on beauty.

Moissanite Sizing: Carat Equivalent vs Actual Weight

Moissanite is slightly lighter than diamond, so 1 carat of moissanite by weight appears visually larger than 1 carat of diamond. For this reason, moissanite is often sold by millimetre size and marketed with a 'diamond equivalent weight' (DEW) to help buyers compare accurately. When shopping, use the DEW measurement rather than the actual carat weight.

Available Shapes and Cuts

Moissanite is available in nearly all the same shapes as diamonds:

• Round Brilliant — the classic, maximising sparkle and fire

• Oval — elongated, elegant, makes fingers appear slender

• Cushion — soft corners with a vintage, romantic feel

• Pear — teardrop shape, distinctive and eye-catching

• Emerald — step cut with a dramatic hall-of-mirrors effect

• Marquise — boat-shaped, maximises visual surface area per carat

Is Moissanite Ethical?

Absolutely. Since nearly all moissanite sold today is lab-created, it avoids the ethical and environmental concerns of mining entirely. There are no conflict stone issues, no environmental land disruption, and no harm to mining communities. For buyers motivated by ethics and sustainability, moissanite is an excellent choice.

Will Moissanite Lose Its Sparkle Over Time?

No. Moissanite is an incredibly stable and durable gemstone. It will not cloud, discolour, or lose its brilliance over time. Like any gemstone, it will pick up oils and soap residue with daily wear, but a simple clean with mild soap and a soft brush will restore it to sparkling perfection.

Is Moissanite Right for You?

Moissanite is an excellent choice if you want a stunning, durable, ethically sourced gemstone at a price that allows you to invest in the setting or other priorities. It is ideal for those who love exceptional brilliance and fire, are conscious of budget, or simply want a beautiful stone without the natural diamond price tag. Explore our moissanite collection to discover the wide range of shapes, sizes, and settings available — and find the perfect stone for your story.