cubic zirconia vs moissanite
Beauty & Fashion

Cubic Zirconia vs Moissanite vs Diamond: A Comparison Guide

Navigating the glimmering world of precious stones can be quite a task. In this journey, we delve into the cubic zirconia vs moissanite conundrum, introducing the age-old diamond into the mix for an insightful comparison.

History and Origin of the Three Stones

Firstly, diamonds, famed for their natural brilliance and durability, have long been mined and cherished. Conversely, cubic zirconia, a synthetic gem, burst onto the scene in the 1970s as a diamond alternative. Moissanite, discovered in a meteor crater by Henri Moissan in the late 19th century, is another synthetic stone often compared to diamonds due to its similar properties.

Physical and Optical Properties

Cubic Zirconia

Cubic Zirconia

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Cubic Zirconia is a synthetic gemstone that bears a close resemblance to diamonds. Its physical properties include a hardness rating of 8.5 on the Mohs scale, making it a durable choice for daily wear. Optically, it is flawless with no inclusions or blemishes, giving it a clear and brilliant shine.

Its high refractive index results in high brilliance and fire, meaning it reflects a lot of light and shows more color dispersion, respectively, than a diamond. However, the high dispersion sometimes gives it an overly bright appearance, which can make it look less natural than a diamond.



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Moissanite, another synthetic stone, was initially discovered in a meteor crater, leading to its reputation as a “gem from the stars”. Physically, it’s nearly as hard as a diamond, with a 9.25 hardness rating on the Mohs scale, making it highly resistant to scratches and suitable for everyday wear.

In terms of optical properties, moissanite surpasses even diamonds. It has a higher refractive index, leading to a brilliant sparkle, and it also has a higher dispersion, resulting in exceptional fire and giving it a distinctive, intense sparkle. However, this can make it appear slightly different from a diamond, especially under certain lighting conditions.



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Diamonds, being natural stones, are unique and vary widely in their physical and optical properties. They are the hardest known material, scoring a 10 on the Mohs scale, which makes them incredibly durable and resistant to scratches.

Optically, diamonds exhibit a high refractive index, which contributes to their famed brilliance. They have a lower dispersion than both cubic zirconia and moissanite, which results in less visible fire and a more subdued sparkle.

However, the brilliance and fire of a diamond can be greatly affected by its cut quality. Diamonds come in a range of colors, from colorless to slightly yellow or brown, and also in fancy colors such as blue, green, and pink.

They can also range from flawless to included, with the presence of internal or external flaws known as inclusions and blemishes. The highest-quality diamonds, known as flawless diamonds, have no inclusions or blemishes visible under 10x magnification.

Comparison of the Three Stones: Cubic Zirconia vs Moissanite vs Diamond


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1. Cubic Zirconia vs Moissanite vs Diamond: Hardness and Durability


Renowned for their unmatchable hardness, diamonds score a perfect 10 on the Mohs scale. This remarkable hardness makes diamonds extremely resistant to scratches, maintaining their polished, pristine finish over decades and even centuries.

Diamonds are the epitome of durability, able to withstand daily wear and tear with minimal damage. Their resilience extends to high temperatures and pressures, contributing to their enduring appeal and longevity. However, despite their hardness, diamonds can chip or break if hit at certain angles with sufficient force.


A worthy contender to diamonds in terms of hardness, moissanite has a Mohs scale rating of 9.25. This hardness makes it highly resistant to scratches and suitable for daily wear, much like a diamond.

Moissanite’s durability is impressive, it can withstand exposure to heat and everyday chemicals, making it a practical choice for all types of jewelry, including rings and bracelets that experience heavy wear. While not as hard as a diamond, its resilience to wear and tear is significantly better than many other gemstones and simulants.

Cubic Zirconia

With a rating of 8.5 on the Mohs scale, cubic zirconia (CZ) is reasonably hard and should resist most scratches. However, when compared to diamonds and moissanite, CZ falls short in terms of scratch resistance and durability. Over time, cubic zirconia may show wear, including scratches and abrasions, and it can also become cloudy, losing some of its original brilliance.

It’s worth noting that despite its lower hardness rating, cubic zirconia still offers decent durability and is suitable for use in all types of jewelry. Its affordability also means it can be replaced easily if it gets too worn or damaged.

2. Cubic Zirconia vs Moissanite vs Diamond: Brilliance and Fire


A diamond’s brilliance is renowned. Its high refractive index contributes to its radiant sparkle, captivating the eye. However, diamonds have a lower dispersion than moissanite and cubic zirconia, which means their fire, or the splitting of light into spectral colors, is less intense.

This gives diamonds a balanced sparkle that’s neither too dull nor too intense, contributing to their timeless appeal. The brilliance and fire of a diamond can be greatly affected by its cut quality.


Moissanite stands out for its exceptional brilliance and fire. With a higher refractive index than diamonds, moissanites exhibit more brilliance, meaning they reflect more light. Their high dispersion gives moissanite a fiery rainbow sparkle, even more so than diamonds and cubic zirconia.

Under certain light conditions, this intense fire can give moissanite a slightly different sparkle than diamonds, which some people prefer and others do not.

Cubic Zirconia

Cubic Zirconia also boasts high brilliance due to its high refractive index. In terms of fire, cubic zirconia outperforms diamonds, displaying an impressive play of spectral colors. However, the high dispersion of cubic zirconia sometimes gives it an overly bright appearance, which can make it look less natural than a diamond.

3. Cubic Zirconia vs Moissanite vs Diamond: Cut and Shape


Diamonds can be cut into a wide variety of shapes, from traditional round brilliants to fancy shapes like princess, pear, oval, marquise, and more. The cut of a diamond significantly impacts its brilliance, and a well-cut diamond can maximize light return, enhancing its sparkle.


Like diamonds, moissanite can be cut into almost any shape, including round, cushion, radiant, and pear, among others. Moissanite cuts often aim to enhance its brilliance and fire, with round and oval cuts being popular for maximizing these qualities.

Cubic Zirconia

Cubic Zirconia is easy to cut and can mimic any diamond shape, from traditional to fancy cuts. Often, cubic zirconia is cut to mimic popular diamond cuts and maximize its brilliance and fire.

4. Cubic Zirconia vs Moissanite vs Diamond: Clarity and Color


Diamonds occur naturally in a wide range of colors and clarity grades. Color ranges from colorless to slightly yellow or brown, and fancy colors such as blue, green, and pink are also found. Clarity refers to the presence of internal or external flaws, known as inclusions and blemishes.

Diamonds can range from flawless (no inclusions or blemishes visible under 10x magnification) to included (inclusions and/or blemishes visible to the naked eye).


Moissanite is usually near colorless but can exhibit a slight yellow or gray tint in certain lights, especially in larger sizes. In terms of clarity, most moissanite sold today is of high clarity.

Cubic Zirconia

Cubic Zirconia is typically made to be clear and colorless, mimicking the look of a perfect diamond. However, it can be produced in a variety of colors. Because it’s lab-created, cubic zirconia is usually flawless with no inclusions or blemishes.

5. Cubic Zirconia vs Moissanite vs Diamond: Pricing and Affordability


Diamonds are typically the most expensive of the three stones, due to their natural occurrence and the processes involved in mining, cutting, and polishing them. The price of a diamond is determined by the Four C’s: Cut, Color, Clarity, and Carat weight.

High-quality diamonds, especially those that are large and have exceptional cut, color, and clarity grades, can fetch extremely high prices. For many, the cost of a diamond is justified by its enduring value, timeless appeal, and the status it symbolizes.


Moissanite offers a much more affordable alternative to diamonds. It provides a similar level of hardness and even greater brilliance at a fraction of the cost. The price of moissanite is typically determined by size and whether it is a classic (slightly yellow) or a premium (colorless) variant. Although more expensive than cubic zirconia, it’s durability and optical qualities make it a popular choice for those seeking a balance between affordability and luxury.

Cubic Zirconia

Cubic zirconia is by far the most affordable of the three stones. It’s manufactured in a lab, which keeps production costs low. The price varies slightly depending on size, cut, and color, but even the highest-quality cubic zirconia stones are still very budget-friendly.

Due to its affordability, cubic zirconia is a popular choice for fashion jewelry and for those wanting the look of a diamond without the significant expense. It’s also often used as a placeholder in engagement rings while the actual diamond ring is being made or paid off.

6. Cubic Zirconia vs Moissanite vs Diamond: Popularity and Perception


Traditionally, diamonds have held a prestigious position in society. They’ve been perceived as symbols of wealth, power, and everlasting love for centuries. Their popularity in engagement rings has remained consistent, due to their timeless appeal and the phrase “diamonds are forever” which has embedded itself in popular culture.

Despite the emergence of alternatives, diamonds remain sought-after due to their uniqueness, durability, and the status symbol they represent.


Moissanite has seen a surge in popularity in recent years. It’s perceived as a brilliant, durable, and more affordable alternative to diamonds. For individuals concerned with the environmental and ethical implications of mining diamonds, moissanite offers a great alternative, since it’s lab-grown.

The intense fire and brilliance of moissanite also make it a popular choice among those seeking a standout gemstone.

Cubic Zirconia

Cubic zirconia, although it was once looked down upon as a “cheap” diamond imitation, has gained acceptance and popularity over time. It’s often seen as an economical alternative for those who want the diamond look without the hefty price tag. In addition, cubic zirconia is popular in fashion jewelry and as a temporary stand-in for diamonds in engagement rings.

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How to Choose the Right Stone

Choose the Right Stone

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1. Personal Preferences and Values

Your choice of gemstone will be heavily influenced by personal preference. If you prefer a classic, timeless gem with unmatched durability, a diamond might be right for you. However, if you’re looking for a gem that offers brilliant fire and sparkle at a more affordable price, moissanite could be a great choice.

For those seeking a budget-friendly, flawless gem that mimics the look of a diamond, cubic zirconia could be the answer.

2. Budget

Budget is a major factor in choosing a gemstone. Diamonds, particularly high-quality ones, can be quite expensive. Moissanite offers a similar level of hardness and even greater fire at a fraction of the cost of a diamond. Cubic zirconia is the most affordable option.

3. Use of the Jewelry

Consider how and where you’ll wear the jewelry. If it’s for an engagement ring or a piece you’ll wear daily, you might prioritize hardness and durability, making diamond or moissanite more suitable. If it’s a piece you’ll wear occasionally, or you’re worried about losing it, cubic zirconia might be a better option.

4. Ethical Considerations

If you’re concerned about the environmental impact and potential ethical issues related to diamond mining, you might lean towards lab-grown alternatives like moissanite or cubic zirconia. These gemstones have minimal environmental impact and are conflict-free.

5. Certification and Verification

Certification is particularly important if you’re considering a diamond, as it confirms the diamond’s quality and characteristics. However, even if you’re buying moissanite or cubic zirconia, purchasing from a reputable dealer who can provide information about the gemstone’s quality and origin is crucial.


The debate between cubic zirconia vs moissanite, and their comparison with diamonds, uncovers unique aspects of each stone. Ultimately, the choice between these sparkling gems boils down to personal preference, intended use, and budget.

AboutCorinne Switzer

Corinne is an avid reader and takes a keen interest in conspiracy theories. When not busy with her day job, she likes to indulge the writer in her and pens columns on a wide range of topics that cover everything from entertainment, healthy living to healthcare and more.