Do Lab Grown Diamonds Pass the Moissanite Test?

Do lab-grown diamonds test as moissanite? This is a common question for those considering purchasing a diamond, whether natural or lab-grown. While lab-grown diamonds are chemically and physically identical to natural diamonds, they can still be distinguished from moissanite using specific tests.

Testing for Authenticity

One way to test whether a diamond is real or not is by using an electrical conductivity tester. Moissanite is a semiconductor and conducts electricity differently than diamonds. Hence, this test helps differentiate between the two.

Another test involves checking how the stone reacts to UV rays. Moissanite has a different reaction than diamonds, making it distinguishable from lab-grown diamonds.

Understanding the differences between lab-grown diamonds and moissanite is key to making an informed decision when buying a diamond.

Exploring Lab-Grown Diamonds

If you’re considering buying a diamond, you may have heard about lab-grown diamonds. These diamonds, also known as lab-created diamonds, are a popular alternative to natural diamonds. But how do they compare to moissanite?

Lab-grown diamonds are created in a laboratory using advanced technological processes that replicate the conditions under which diamonds naturally develop in the Earth’s mantle. There are two main methods: High Pressure-High Temperature (HPHT) and Chemical Vapor Deposition (CVD).

Made of pure carbon, lab-grown diamonds have the same atomic and chemical properties as natural diamonds. They are even available in colors such as blue, green, yellow, and pink. Unlike moissanite, lab-grown diamonds test as real diamonds. The physical and chemical similarities between lab-grown and natural diamonds make it difficult to distinguish between the two, even for experts who often need specialized equipment for identification.

When it comes to purchasing a diamond, lab-grown diamonds offer a more affordable and ethical option. Created in a controlled environment, they address both environmental and social concerns. Moreover, their prices are significantly lower than natural diamonds, making them accessible to a wider range of consumers.

In summary, lab-grown diamonds are an excellent alternative to natural diamonds. They possess identical physical and chemical properties, making them an appealing option for those seeking a diamond without the high price tag or ethical concerns.

Comparing Lab-Grown Diamonds and Moissanite

When deciding between lab-grown diamonds and moissanite, several factors come into play. Although both options are popular alternatives to natural diamonds, they differ in properties and appearance.


Lab-grown diamonds and moissanite have different physical properties that affect their appearance. Lab-grown diamonds are made of carbon, while moissanite is made of silicon carbide. This difference results in lab-grown diamonds having a higher refractive index, giving them a brilliant sparkle. On the other hand, moissanite has a higher dispersion, meaning it exhibits more fire or colored flashes of light.

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Concerning color, both lab-grown diamonds and moissanite come in a range of colors, including colorless and near-colorless options. However, lab-grown diamonds tend to have a more consistent color than moissanite, which may show a slight green or yellow tint in certain lighting conditions.


Both lab-grown diamonds and moissanite are durable options for jewelry, but their hardness differs. Lab-grown diamonds score a perfect 10 on the Mohs scale of mineral hardness, making them the hardest substance on Earth. Moissanite, on the other hand, scores 9.25, slightly less hard than diamonds.

While both stones are resistant to scratches and chips, lab-grown diamonds are overall more durable. They are also more heat-resistant, preventing discoloration or cloudiness that can occur with moissanite.


The affordability of lab-grown diamonds and moissanite is a major factor driving their popularity. Generally, lab-grown diamonds are more expensive than moissanite, yet significantly cheaper than natural diamonds.

The price of lab-grown diamonds and moissanite varies based on factors such as size, color, and clarity. However, moissanite tends to be less expensive than lab-grown diamonds, making it an attractive option for budget-conscious individuals.

Making the Choice

Choosing between lab-grown diamonds and moissanite depends on personal preference and priorities. Factors such as durability and color consistency favor lab-grown diamonds. However, if you seek affordability and greater fire and brilliance, moissanite may be the better choice for you.

Understanding Physical and Chemical Properties

Lab-grown diamonds have a chemical composition identical to that of natural diamonds. Comprising pure carbon atoms arranged in a crystal lattice structure, they match natural diamonds’ hardness and scratch resistance. Moissanite, in contrast, consists of silicon carbide, an entirely different compound.

When it comes to refractive index, moissanite surpasses lab-grown diamonds, displaying more fire and brilliance. While lab-grown diamonds have high dispersion and sparkle, moissanite’s higher refractive index contributes to its superior brilliance.

In terms of clarity, both lab-grown diamonds and moissanite can be found in high-quality grades with minimal visible inclusions. However, moissanite’s double refraction can occasionally cause a “rainbow effect” when viewed from certain angles.

Lab-grown diamonds and moissanite also differ in their optical properties. Lab-grown diamonds have higher dispersion, meaning they can split light into more colors. On the other hand, moissanite’s higher refractive index contributes to its heightened brilliance.

It’s important to note that lab-grown diamonds may occasionally test as moissanite due to the boron used in the growing process. However, this is uncommon and can be identified with proper testing equipment.

Overall, while lab-grown diamonds and moissanite share some physical and chemical properties, they remain distinct gemstones with unique characteristics.

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Lab-Grown Diamonds: No Moissanite Test

For those wondering whether lab-grown diamonds test as moissanite, the answer is no. While they may appear similar to the untrained eye, lab-grown diamonds and moissanite have different chemical and physical properties that trained professionals can easily distinguish.

To differentiate between lab-grown diamonds and moissanite, a diamond tester can be used. These testers measure the electrical conductivity of the stone, providing different readings for moissanite and diamonds due to their differing conductivities.

If unsure about the stone you have, taking it to a gemological lab or a trained gemologist can help. They use magnification and other tools to examine and determine the stone’s identity.

It’s crucial to note that lab-grown diamonds and moissanite, while both diamond alternatives, are not the same. Lab-grown diamonds consist of carbon atoms, akin to their natural counterparts, while moissanite consists of silicon carbide. These stones possess their own distinctive properties despite their beauty and durability.

In conclusion, lab-grown diamonds do not test as moissanite. To ascertain your stone’s identity, consult a professional or use a diamond tester.

Value and Pricing

Value and pricing considerations demonstrate why lab-grown diamonds and moissanite are popular alternatives to natural diamonds. However, there are differences to take into account.

Price Comparison

Moissanite generally presents a more affordable option than lab-grown diamonds, with natural diamonds being the costliest. For instance, a 1-carat moissanite stone ranges from $300 to $600, while an equivalently sized lab-grown diamond can cost between $800 and $1,500.

Carat Weight

Both lab-grown diamonds and moissanite are available in various carat weights, with price increasing accordingly. Consequently, a 1-carat lab-grown diamond will be costlier than a 0.5-carat one.

Resale Value

Compared to natural diamonds, both lab-grown diamonds and moissanite have lower resale values due to their lower rarity and value. However, lab-grown diamonds may have a slightly higher resale value than moissanite due to their chemical and physical similarity to natural diamonds.


Quality also affects price. Higher quality stones command higher prices. When purchasing a lab-grown diamond, consider stones graded by reputable institutes such as the Gemological Institute of America (GIA).

In summary, lab-grown diamonds and moissanite provide affordable alternatives to natural diamonds. When making a purchase, factor in price, carat weight, resale value, and quality considerations.

Lab-Grown Diamonds in Jewelry

If you’re seeking diamond jewelry, including engagement rings, and wondering if lab-grown diamonds test as moissanite, there’s good news. Lab-grown diamonds are real diamonds, created through advanced processes that replicate natural diamond development.

Lab-grown diamonds are often used as center stones in engagement rings and can be incorporated into various jewelry pieces. They appeal to those who value ethical sourcing and environmental friendliness.

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When shopping for lab-grown diamond jewelry, consider reputable brands like Brilliant Earth, specializing in sustainable and ethical jewelry. Such companies offer a wide range of styles and designs to suit individual tastes and budgets.

It’s worth mentioning that lab-grown diamonds may have slight variations compared to naturally mined diamonds. These differences may include color or clarity grades, though they are often negligible, as most people cannot distinguish between lab-grown and natural diamonds.

In conclusion, lab-grown diamonds are an excellent choice for ethically sourced and environmentally friendly diamonds. They are real diamonds suitable for a variety of jewelry styles and designs. Ensure you choose a reputable brand like Brilliant Earth, conducting proper research for the best quality and value.

Key Takeaways

Lab-grown diamonds and moissanite are popular alternatives to natural diamonds, but they differ in important ways. Here are key takeaways to consider when contemplating these gemstones:

  • Lab-grown diamonds are made in a laboratory, replicating natural diamond formation conditions. They are chemically and physically identical to natural diamonds but offer affordability and ethical sourcing.
  • Moissanite, however, is a distinct gemstone with a different chemical composition and slightly lower durability than diamonds. Moissanite is graded differently as well.
  • When testing lab-grown diamonds and moissanite, it is crucial to use suitable tools. Relying solely on diamond testers can lead to false results due to the presence of lab-grown diamonds in the market that can yield inaccurate readings. Other testing equipment is necessary for proper identification.
  • Lab-grown diamonds score a perfect 10 on the Mohs scale, signifying exceptional hardness. They withstand everyday wear and tear.
  • Moissanite, with a hardness rating of 9.25, is quite durable, though it may be more prone to scratches over time.
  • Lab-grown diamonds are both scratch-resistant and durable, making them suitable for daily wear.
  • Lab-grown diamonds and moissanite are both affordable compared to natural diamonds. However, price variations exist, with moissanite generally being the most affordable and natural diamonds the costliest.
  • Resale values for lab-grown diamonds and moissanite are lower than those of natural diamonds due to differences in rarity and value.
  • Quality, including color and clarity grades, affects the price of lab-grown diamonds. Seek reputable grading institutes like GIA when purchasing to ensure quality.
  • In summary, lab-grown diamonds and moissanite, while providing alternatives to natural diamonds, possess distinct properties. Carefully weigh your priorities and preferences when making a purchase.

Remember, lab-grown diamonds offer an ethical and affordable option, while moissanite provides fire and brilliance at a lower cost. Select the gemstone that aligns best with your personal requirements and preferences.