Lab Grown Diamond vs Moissanite: Which Is Better for You?

Short answer: Choose a lab grown diamond if you want a real diamond with a classic white sparkle and an IGI or GIA grading report. Choose moissanite if you want the biggest, most fiery stone for the lowest price and you enjoy a rainbow-like sparkle. Both are hard enough for everyday wear, and neither is bought as an investment.

Lab grown diamond vs moissanite is one of the most common questions we hear from couples shopping for an engagement ring. Both stones look bright and white, both are made in a lab, and both cost far less than a mined diamond. But they are different gemstones, and the right choice depends on what matters most to you.

This guide walks through the real differences: what each stone is, how it sparkles, how it wears, what it costs, how it is graded and which settings suit it best. By the end you should know which one fits your taste, your budget and your plans.

What Is the Difference?

A lab grown diamond is a real diamond made of pure carbon. Moissanite is a different mineral, silicon carbide, first found by Henri Moissan in a meteor crater in 1893 and now created in labs for jewelry. A lab grown diamond is chemically the same as a mined diamond; moissanite is not a diamond at all.

That single fact drives most of the other differences. Because a lab grown diamond is diamond, it has the same hardness, sparkle and grading system as a mined diamond. Because moissanite is its own gemstone, it has its own optical character, its own weight and its own way of being described.

How Each Stone Is Made

Both stones are grown in controlled conditions, but the processes are different.

Lab grown diamonds: CVD and HPHT

Lab grown diamonds are made in one of two ways. HPHT (high pressure, high temperature) recreates the crushing pressure and heat deep in the earth, turning carbon into diamond around a small diamond seed. CVD (chemical vapor deposition) builds diamond layer by layer from a carbon-rich gas onto a thin diamond plate. Both methods produce real diamond, and once the rough is cut and polished, it is graded exactly like a mined stone.

Moissanite: silicon carbide crystals

Natural moissanite is extremely rare and occurs only as tiny crystals, far too small for jewelry. Every moissanite used in rings and earrings is grown in a lab as silicon carbide crystals, then cut and polished like any other gemstone. Modern growing methods produce colorless and near-colorless stones with very high clarity.

For buyers, the takeaway is simple: neither stone is mined, both are durable, and the method of growth does not make one more "real" than the other. The difference is in what the stone is, not how it was made.

Sparkle and Appearance

Moissanite bends light more strongly than diamond and splits it into more color, so it shows bold rainbow flashes, especially in sunlight and in larger stones. A lab grown diamond gives a crisper white sparkle with balanced flashes of color. Many people love the extra fire of moissanite, while others prefer the traditional diamond look. If possible, compare both in daylight before deciding.

Shown: Round Moissanite Solitaire Stud Earrings

Where the difference shows most

• Sunlight: direct sun brings out moissanite's rainbow flashes. Diamond looks whiter and more contrasted.
• Indoor light: under softer light, the two look much closer, and most people can't tell them apart at a normal distance.
• Stone size: the bigger the stone, the more noticeable moissanite's fire becomes. In small accent stones, the difference is hard to see.
• Cut: round brilliants show the most sparkle in both stones. Step cuts such as emerald show moissanite's double refraction a little more, which gives facet edges a slightly soft look under close inspection.

Neither look is better. It is purely a matter of taste. Some people want the classic look they recognize from family heirlooms; others love the extra color and "disco ball" effect of moissanite.

Color and Clarity

Lab grown diamonds are graded on the same color and clarity scales as mined diamonds. Color runs from D (colorless) down the alphabet, and clarity runs from flawless to included. You choose the grade you want, and the price follows the grade, so you can trade a little color or clarity for a bigger stone.

Moissanite is usually sold in a narrower range. Most jewelry moissanite today is colorless or near-colorless with very high clarity, so there is less to compare. Some moissanite can show a faint warm or grey tint in certain lights, especially in larger stones, which is why it is worth choosing a colorless grade if you plan a white gold setting.

Tip: For a lab grown diamond, a near-colorless grade with eye-clean clarity often gives the best value, because the difference from the top grades is very hard to see once the stone is set.

Durability for Everyday Wear

Both stones are excellent for daily wear. Diamond is the hardest natural material at 10 on the Mohs scale, and moissanite is close behind at 9.25, harder than sapphire and ruby. Either stone will handle years of everyday life in a well-made setting.

Hardness is about resisting scratches. Toughness, the ability to resist chipping from a hard knock, also matters. Both stones are tough enough for engagement rings, but any gem can chip at a thin edge or pointed tip. That is why marquise, pear and princess shapes are best set with protective prongs or a bezel.

Neither stone clouds or changes color over time. If either one looks dull, the cause is almost always skin oil, lotion or soap on the back of the stone, and a soak in warm soapy water with a soft brush brings it right back.

Simple care for either stone

• Clean weekly: soak for a few minutes in warm water with a drop of mild dish soap, brush gently behind the stone, rinse and pat dry.
• Put rings on last: apply lotion, perfume and hairspray first, so less residue builds up under the stone.
• Take rings off for hard work: gym sessions, gardening and moving furniture are when knocks and bent prongs happen.
• Store separately: both stones can scratch softer gems and gold, so keep each piece in its own pouch or compartment.
• Check prongs yearly: a jeweler can tighten worn prongs before a stone works loose.

Price and Value

For the same size, moissanite usually costs much less than a lab grown diamond, which lets you choose a larger center stone on the same budget. Keep in mind that neither stone is an investment. Lab grown diamonds and moissanite are bought for their beauty and value at purchase, not for resale.

A lab grown diamond already costs far less than a mined diamond of the same quality, so many buyers find it is the sweet spot: a real diamond with a grading report, at a price that leaves room for a better setting. Moissanite goes further on price, which makes it popular for large center stones, eternity bands and pieces with many stones, such as tennis bracelets.

Where your money goes

• Center stone: with a lab diamond, carat, color, clarity and cut set the price. With moissanite, size and color grade matter most.
• Metal: 10K, 14K and 18K gold each change the total, as does the weight of the band.
• Setting: halos, pavé bands and hidden details add stones and labor.
• Extras: custom designs and engraving can add to the cost.

Size, Weight and How Stones Are Measured

Moissanite is lighter than diamond, so a moissanite and a diamond of the same millimeter size do not weigh the same. For that reason, moissanite is often sold by millimeter size or by a "diamond equivalent" weight, while lab grown diamonds are sold by carat weight.

When comparing the two, compare the face-up size in millimeters, because that is what you actually see on the hand. A 6.5 mm round stone looks the same size whether it is diamond or moissanite.

Shop the styles in this guide

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Marquise Cut Moissanite Engagement Ring With Pave Band $351.00 Shop Now

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Grading Reports and Certificates

Lab grown diamonds can be graded by independent labs such as IGI and GIA. The report records the 4Cs (cut, color, clarity and carat), measurements and the fact that the stone is laboratory-grown. Many Ivevar lab grown diamonds come with IGI certificates, and you can check the report number on the lab's website.

Moissanite is not graded by IGI or GIA in the same way. Stones are usually described on a brand or seller report that states the stone type, size and color grade. That is fine for a beautiful ring, but if an independent report is important to you, a lab grown diamond is the better match.

Settings and Metals That Suit Each Stone

Both stones work in every classic setting, but a few pairings help each one shine.

• Solitaire: the simplest way to show off either stone. A lab diamond solitaire looks timeless; a moissanite solitaire lets you go bigger. See our lab grown solitaire rings.
• Halo: a ring of small stones makes the center look larger. With moissanite, a halo adds even more sparkle.
• Three stone: a center with two side stones, popular for anniversaries.
• Eternity and pavé bands: many small stones, where moissanite keeps the cost down.

For metal, white gold makes colorless stones look icy, yellow gold gives a warm, vintage feel, and rose gold flatters warmer skin tones. 14K gold is a popular all-round choice for durability, and 18K gives a richer color.

Best Stone by Type of Jewelry

The right stone can change depending on the piece. Here is how the two compare across the jewelry people buy most often.

• Engagement rings: the most personal choice. A lab grown diamond suits buyers who want the traditional symbolism of a diamond and a grading report. Moissanite suits couples who want a larger center stone or who simply love its fire.
• Wedding and eternity bands: a full eternity band uses many stones, so moissanite keeps the cost manageable. Many people match the band stone to the engagement ring so the two look consistent side by side.
• Stud earrings: at earring size, the sparkle difference is small and hard to notice from a distance. Moissanite studs let you go bigger; lab diamond studs give a classic white look.
• Tennis bracelets and necklaces: these carry dozens of stones, which is where moissanite's lower price per stone really helps.
• Men's rings and hip hop jewelry: iced-out pendants and chains use hundreds of stones. Moissanite is a popular way to get a fully iced look, while lab grown diamond suits buyers who want real diamond throughout.

Common Myths About Both Stones

"Lab grown diamonds are not real diamonds."

False. A lab grown diamond is carbon in the same crystal structure as a mined diamond. Gemological labs grade it on the same 4Cs and simply note that it was grown in a laboratory.

"Moissanite is the same as cubic zirconia."

False. Cubic zirconia is a much softer diamond simulant that can scratch and look worn over time. Moissanite is far harder at 9.25 on the Mohs scale and keeps its polish for a lifetime.

"Moissanite turns yellow or cloudy."

Modern colorless moissanite does not change color or turn cloudy. Dullness comes from dirt and oil, which clean off easily.

"Nobody will respect a lab-made stone."

What matters is honest description. A lab grown diamond should be sold as a lab grown diamond and moissanite as moissanite. Chosen openly, both are beautiful, durable gems you can wear with confidence.

Which Should You Choose?

• Choose a lab grown diamond if having a real diamond matters to you, you want a classic look, or you want an IGI or GIA grading report.
• Choose moissanite if you want maximum size and sparkle for your budget, or you love colorful fire.

A few questions can help you decide:

1. Does the word "diamond" matter to you or your partner? If yes, choose a lab grown diamond.
2. What size do you want on your budget? If a large stone is the priority, moissanite stretches further.
3. How do you feel about rainbow sparkle? Look at both stones in daylight and see which one you prefer.
4. Is this an engagement ring or a fashion piece? Many people choose a lab diamond for the engagement ring and moissanite for everyday earrings or bracelets.

Explore our lab grown diamond engagement rings and moissanite engagement rings, or see the side-by-side chart on our Moissanite vs Lab Grown Diamond vs Diamond page.

Shop at Ivevar

At Ivevar we make both lab grown diamond and moissanite jewelry in gold from 10K to 18K, and every piece is clearly labeled for what it is. Browse all lab grown diamonds or all moissanite to compare styles side by side. We ship free worldwide, offer 30-day easy returns, and can design a custom ring with you over a virtual appointment.

Frequently Asked Questions

Can people tell moissanite from diamond?

Most people cannot at a glance. Up close, and especially in bright light, moissanite shows stronger rainbow flashes, which a trained eye may notice.

Is moissanite a fake diamond?

No. Moissanite is its own gemstone, not an imitation. It should simply be sold as moissanite, not as diamond.

Does moissanite get cloudy?

Good quality moissanite does not turn cloudy. Like any stone, it can look dull when dirty, and a simple cleaning restores its sparkle.

Is a lab grown diamond a real diamond?

Yes. It is chemically, physically and optically the same as a mined diamond. The only difference is where it was grown.

Which is more durable, lab diamond or moissanite?

Lab diamond is harder at 10 on the Mohs scale versus 9.25 for moissanite. Both are durable enough for rings worn every day.

Will a diamond tester detect moissanite?

A basic thermal tester may read moissanite as diamond. A multi-tester that also checks electrical conductivity will identify it as moissanite.

Which holds its value better?

Neither should be bought as an investment. Both are best chosen for beauty and wearability rather than resale.

Can I mix moissanite and lab diamonds in one ring?

Yes. Some buyers choose a lab diamond center with moissanite accents, or the reverse. Just make sure each stone is clearly described.

Author Bio

Aumsri Pradhan

Founder, Ivevar Luxury

Aumsri Pradhan leads Ivevar Luxury, a Surat-based brand that handcrafts lab grown diamond and moissanite jewelry in its own workshop, and shares practical buying guidance on the Ivevar blog. View author profile ›