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A loose moissanite gemstone faces to the left across from a loose diamond gemstone facing to the right

Moissanite vs Diamond: Which One Suits You?

Both diamonds and moissanites are beautiful, sparkling stones that bring dreamy shimmer to an engagement ring. Debating between diamond and moissanite engagement rings? Explore our guide to learn about the similarities and differences between these stones including more about their colour, sparkle, clarity and price.
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Origins and Rarity

Diamonds can be found naturally or they can be created in a lab. Diamonds are the hardest substance on earth, made of pure carbon that has undergone intense heat and pressure. However, they are not the rarest gemstone—it is a particular diamond’s colour, clarity, carat and, eventually, cut, that makes it uniquely valuable

Moissanite is very rare to find in nature, as it originates from outer space and is naturally found in meteorites that have landed on Earth. Therefore, most moissanite stones are lab-created and less rare.


From a distance, diamonds and moissanites can look quite similar, but as you draw near, the differences become more apparent. One of the fastest ways to tell a diamond apart from a moissanite is to look at the colour differences in the brilliance of the stones. A diamond will sparkle with white light while a moissanite will sparkle with rainbow flashes. Known by many as a disco ball effect, some people prefer this moissanite feature while others do not.


Diamonds flaunt a famous sparkle that is widely known and loved, with plenty of fire and refraction to mesmerize. Known as brilliance, the diamond’s sparkle is powered by its facets and cut. Quality cut allows a diamond to bounce and reflect light back to the eye.

Moissanite also offers brilliance that is a result of its higher refractive index. This brings moissanite a dramatic rainbow of hues that make it an attention-grabbing stone.

The choice between the two stones is entirely dependent on the personality and preferences of the wearer.


Diamonds are traditionally colourless, though fancy colour diamonds are an increasingly popular choice. A colourless diamond will shine with a white sparkle. Moissanite, on the other hand, is not a true colourless stone. Moissanites can have a tinge of colour, such as a grey hue, in certain lighting. Some moissanites may have a yellow hue that resembles a K colour grade diamond.


Gemstone clarity is important, too. A perfectly flawless diamond is extremely rare and precious. However, many of the inclusions or blemishes in a diamond can be impossible to see without magnification and training. The Gemmological Institute of America clarity grading scale is used to sort diamonds according to their clarity.

Due to their lab-created origin, most moissanites are nearly flawless. An average moissanite stone would rank at a desirable “Very Slightly Included,” or “VS” level, using the diamond’s GIA clarity grading scale.

Hardness & Wearability

Diamonds are the hardest substance on earth. Scoring an unparalleled 10 on the Mohs Scale, they’re an ideal choice for everyday wear, since they cannot be scratched except by another diamond.

Moissanite features a 9.25 on the Mohs scale, making it very hard and durable as well. It is also resistant to chipping or breaking, making it a fantastic stone for everyday wear.


Gemstones on the market today often undergo one or more enhancements. Diamonds can be treated to enhance or change their colour or to improve the appearance of their clarity. HPHT (high-pressure, high-temperature) treatments, heat treatments, irradiation and coatings can give a diamond a new colour or enhance its natural hue. Laser drilling can be done to remove imperfections, and fracture filling can fill in white fractures and make them less noticeable.

Meanings and Symbolism

Diamonds are a renowned symbol of love and faithfulness, and they have a long history of use in engagement rings. Colourless diamonds are a sign of purity, and the unparalleled hardness of the diamond makes it a natural symbol of power.

All gemstones have special meaning. Moissanites feature exceptional hardness as well, making them symbolic of the strength of your bond and love. Because natural moissanites come from meteorites originating in space, they also are a sign of connectedness to the universe. They can also be a symbol of unlocking potential, which can bring ongoing meaning as your relationship grows.

Popular Ring Styles and Settings

Diamonds come in a wide range of cuts to showcase the beauty of the stone and suit the wearer’s personality. Cut is different from shape, which describes the outline of the gemstone when you're looking down on it. The cut is all about symmetry, balance, and bringing out a stone’s natural beauty while minimizing its flaws. The classic round cut, elegant square-shaped princess cut, sophisticated cushion cut and vintage-inspired emerald cut are popular for engagement rings. Diamonds sparkle beautifully in virtually any setting type, including 3 diamond rings.

Moissanites, like diamonds, can feature a wide range of cuts, but round cuts best showcase their renowned fire and brilliance. The radiant cut is also dramatic, designed for moissanite to give it an alluring rectangular shape while maximizing its sparkle. The princess cut is a traditional option that showcases the fire of the stone. A more contemporary trillian cut is also a stunning choice, as it enhances the dazzling quality but gives a ring an edgy, modern style. Because of its colour differences, moissanite is best in a solitaire ring setting or alongside moissanite stones of similar characteristics.

With such a breathtaking array to choose from, selecting a cut is truly up to the personality and style of the wearer.

More About Diamonds

Diamonds have been the standard-bearer for expressions of love since at least 1477, when the Archduke Maximilian of Austria proposed to his love with the first recorded diamond engagement ring. They have remained the most popular choice for engagement and wedding rings. Diamonds are available in a variety of shapes, sizes and colours.

More About Moissanite

Moissanite is a more recently discovered gemstone, happened upon in 1893 by Henri Moissan when he was examining an Arizona crater left by a meteorite that carried the mineral to Earth. Henri had thought he found diamonds but realized their chemical composition was very different upon closer inspection. Today, moissanites are a popular stone for engagement rings due to their sparkle, durability, lower price tag and likeness to diamonds. Nearly all moissanite engagement rings use lab made stones.

Chemical Differences

When considering the moissanite vs diamond debate from a molecular level, there are a lot of differences between these two stones. Diamonds are comprised of carbon that has been exposed to immense pressure. Moissanite, on the other hand, is made of silicon carbide. Diamonds are created deep in the earth’s crust and can also be created in labs.

Naturally occurring moissanite is only found from meteorites so the majority of moissanite gems for sale are made in a laboratory setting.


Many people in search of an eco-conscious stone opt for lab-made gems. Moissanite is a lab-made gemstone that’s an increasingly popular choice. Lab made diamonds are also growing in popularity, so both stone types offer an environmentally-conscious option.

Differences in Measuring Moissanite vs Diamonds

Diamonds and moissanites are both measured differently to determine their size. Diamonds are measured by their carat weight. A diamond carat measures how large a diamond is by its weight. Moissanites, on the other hand, are most often measured by their millimetre size rather than their carat weight.

Moissanite vs Diamond Weight

Weight is a quick way to tell a diamond vs a moissanite. Moissanites are lighter than diamonds, with a moissanite stone weighing an average of 15% less than a comparable diamond.

Caring for Your Diamond or Moissanite Jewellery

  • Like all fine jewellery, both diamond and moissanite rings should be cleaned and checked regularly for loose stones or any repairs needed to the settings regularly.
  • Proper gemstone care is essential for lifelong enjoyment of your ring.
  • Moissanite’s make-up of silicon carbide naturally fends off build-up, but a routine cleaning ensures that it always looks its best.

Moissanite Ring vs Diamond FAQs

Moissanite engagement rings are best cleaned with mild soaps or jewellery cleaners. A quick soak in a gentle cleaning solution can make cloudy moissanite rings shine again.

Lab-made moissanite, which is the most commonly available version of this stone, is created by combining its base chemicals. Then, pressure and heat are applied to create the stone.

Jewellers can quickly distinguish between a moissanite and a diamond by identifying the differences in structure, weight, light refraction and overall stone colour. The average person can identify a diamond vs moissanite by inspecting the brilliance. In general, a diamond will have a white sparkle while a moissanite will have a more colourful sparkle that can produce a disco ball effect.

Blue Nile Promise

If you’re still looking for the ring that is quintessentially you, we’re here to offer our expert guidance and stellar services to ensure that you find the ring that is beautifully suited to your taste. To ensure that you feel as thrilled as you should be when making this special purchase, we offer free returns. You can also count on us for complimentary ring sizing to ensure an ideal fit and complimentary cleaning to keep your gemstones sparkling like new. To learn about other gorgeous engagement ring stone options, read our comprehensive gemstone guide

How Do Other Gemstones Compare to Diamonds?

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