Simulated vs Lab Grown Diamonds: What Are Simulated Diamonds?

Diamond shopping used to feel simple, until the options multiplied. Walk into any jewelry store today, or scroll through five minutes of ring content online, and you'll encounter terms like "lab grown," "lab simulated," and "diamond simulant" sitting right next to each other, often with little explanation. Most people assume they mean the same thing. But in reality, they don't.

So here's the question worth answering before you spend a single dollar: are simulated diamonds vs lab grown diamonds actually the same product in different packaging or the two are entirely different things?

The answer changes everything about how you shop. This guide breaks down what simulated diamonds are, what lab grown diamonds are, and how to shop each more confidently.

What Are Simulated Diamonds?

Simulated diamonds, sometimes called diamond simulants, are materials designed to look like diamonds. They are not diamonds. Not chemically, not structurally, not by any gemological standard.

The most common simulants you'll encounter are Cubic Zirconia (CZ), moissanite, and white sapphire. Each mimics the visual appeal of a diamond to varying degrees, but each carries its own chemical identity. CZ is zirconium dioxide. Moissanite is silicon carbide. White sapphire is corundum. None share the carbon crystal lattice that defines a true diamond.

Optically, some simulants, moissanite especially, produce brilliant sparkle. But that sparkle behaves differently. Moissanite's refractive index actually exceeds a diamond's, which gives it a slightly more colorful, "disco ball-like fire” that trained eyes pick up immediately. CZ, meanwhile, tends to look glassy over time as it accumulates surface wear.

Simulants sit at the accessible end of the market by design, built for fashion-forward buyers who prioritize aesthetic impact over material authenticity.

Related: Moissanite vs Lab Grown Diamond vs Diamond

What Are Lab Grown Diamonds?

Lab grown diamonds, also called lab created diamonds, are real diamonds.

They carry the same chemical composition (pure carbon), the same crystal structure, and the same physical and optical properties as any diamond extracted from the earth.

Gemologists use the same grading criteria for assessment. The only difference is origin.
Two methods produce them: HPHT (High Pressure High Temperature), which replicates the extreme conditions of the earth's mantle and CVD (Chemical Vapor Deposition), which grows diamond crystal layer by layer from a carbon-rich gas. Both produce certified, gradeable diamonds that score a 10 on the Mohs hardness scale.

Lab grown diamonds have taken off for a simple reason: they let people buy a real diamond without paying mined-diamond pricing. And for a lot of shoppers, the fact that the stone is grown in a controlled lab setting, not pulled from the ground, feels like a more comfortable choice.

If you’re going the lab grown route, treat certification as your baseline. Avideri’s lab grown diamond jewelry pieces come with IGI certification, so you can see the cut, color, clarity, and carat grades clearly documented and not just listed online.

Simulated Diamonds vs Lab Grown Diamonds: Key Differences

Here's where the distinction becomes impossible to ignore. When people search simulated diamonds vs lab diamonds, they often expect a minor technical gap. The actual gap is fundamental.

The simulated diamond vs lab created divide really comes down to one word: authenticity. A lab grown diamond is a diamond. A simulated diamond resembles one. For everyday fashion jewelry or a budget-conscious gift, that distinction may not matter. For an engagement ring meant to last decades, it matters enormously.

If you wear your jewelry hard and hate maintenance, the hardness gap alone makes the decision easy. Simulants scratch and cloud. Lab grown diamonds don't.

Want to read: Want to Know about the Difference Between Lab Grown Diamonds & Moissanite

Lab Simulated Diamonds: What Does It Mean?

This term causes real confusion and it's worth pausing on it.

"Lab simulated diamond", or "lab simulated diamonds", sounds like it bridges both worlds. It doesn't. In most marketing contexts, the phrase simply means a man-made lookalike: a simulant produced in a laboratory setting, not a lab grown diamond.

Brands sometimes use this language intentionally because "lab" implies precision and quality, while "simulated" quietly signals it isn't a real diamond. The result: buyers assume they're purchasing something closer to a lab grown stone than they actually are.

Read the fine print. If the product description doesn't explicitly state "lab grown diamond" or reference a grading report from GIA or IGI, you're almost certainly looking at a simulant,  regardless of how the listing phrases it. The term lab simulated diamond is a marketing construction, not a gemological category.

Which Should You Choose?

The right choice depends entirely on what you're asking the piece to do.

Choose lab grown if:

• You want a real diamond, chemically, structurally, and sentimentally
• The piece carries long-term significance (engagement ring, heirloom-intended jewelry)
• You want a grading report and the assurance of consistent quality
• Ethical sourcing matters to you without sacrificing authenticity

Choose simulated if:

• Budget is your primary constraint
• The jewelry is trend-driven or fashion-forward, something you might replace in a few years
• You want maximum visual impact for minimum spend
• Daily wear without emotional weight is the goal

The fast-pick rule: if you'll wear the ring every day for the next ten years, invest in lab grown. Simulants look beautiful at purchase, but hardness and surface durability over daily wear is where the difference becomes visible. If the piece is purely for occasional styling, a quality moissanite or CZ serves the job well.

When stacking rings or building a jewelry wardrobe, many buyers mix both, simulated vs lab created diamonds sitting side by side in a curated look, each doing a different job.

If you’re choosing lab grown, make certification non-negotiable, look for clear grading from a recognized lab. Avideri’s lab grown diamond jewelry come with verified reports, so you know exactly what you’re buying.

Conclusion

The simulated diamonds vs lab created conversation isn't about which option is better in absolute terms, it's about matching the right material to the right intention.
Lab grown diamonds offer the real thing: certification, durability, and ethical production. Simulated diamonds offer accessible sparkle without the material substance. Both have earned a place in modern jewelry and both serve genuine needs.

The clearest takeaway: Know what you're choosing before you buy it. A term like simulated diamonds vs lab grown should feel like a useful distinction, not a source of confusion. Ask for the grading report, read the product specs, and let your budget and your intention lead the decision.

When in doubt, treat the grading report as non-negotiable, it tells you everything the listing might not.

Also read: Top 10 Benefits of Buying a Lab Grown Diamond