Simulant Diamonds vs Lab-Grown Diamonds: Which One Should You Choose?
by Manish on Jul 25 2025
Choosing the perfect stone for your engagement ring or fine jewelry often comes down to understanding your options, and two of the most commonly compared choices are simulated diamonds vs lab-created diamonds. While they might appear similar to the naked eye, these stones are vastly different in terms of composition, quality, and long-term value. In this guide, we’ll explore simulated diamonds vs lab-grown diamonds to help you make the most informed choice.
A simulated diamond is a stone that mimics the appearance of a natural diamond but is made from entirely different materials. Popular stimulants include cubic zirconia, Moissanite, and glass. These stones are designed to replicate the brilliance and clarity of diamonds without sharing their physical or chemical characteristics. That’s why, although beautiful, they are not considered real diamonds.
In contrast, lab-grown diamonds are not diamond simulants. They are real diamonds created in a laboratory setting using advanced technology that replicates the natural diamond formation process. These diamonds share the exact physical, chemical, and optical properties of natural diamonds. They score a perfect 10 on the Mohs hardness scale, possess unmatched brilliance, and can be graded using the traditional 4 Cs—cut, colour, clarity, and carat.
So when comparing a simulated diamond vs lab-created stone, know this: one is an imitation, and the other is authentic.
Understanding the distinctions between simulated vs lab-created diamonds is crucial when selecting the right stone for your needs.
If you’re still considering a stimulant, here are some of the most common materials:
Identifying the difference between simulated diamonds vs lab-grown can be challenging without expertise, but here are a few methods:
The answer depends on your priorities:
Still unsure? At Nature Sparkle, we offer both natural and lab-grown diamond options to suit every preference and budget. Whether you’re selecting a centre stone for your engagement ring or investing in timeless fine jewelry, we’re here to help you find the perfect fit.
What Is a Simulated Diamond?
A simulated diamond is a stone that mimics the appearance of a natural diamond but is made from entirely different materials. Popular stimulants include cubic zirconia, Moissanite, and glass. These stones are designed to replicate the brilliance and clarity of diamonds without sharing their physical or chemical characteristics. That’s why, although beautiful, they are not considered real diamonds.
What Are Lab-Grown Diamonds?
In contrast, lab-grown diamonds are not diamond simulants. They are real diamonds created in a laboratory setting using advanced technology that replicates the natural diamond formation process. These diamonds share the exact physical, chemical, and optical properties of natural diamonds. They score a perfect 10 on the Mohs hardness scale, possess unmatched brilliance, and can be graded using the traditional 4 Cs—cut, colour, clarity, and carat.
So when comparing a simulated diamond vs lab-created stone, know this: one is an imitation, and the other is authentic.
Key Differences: Simulated vs Lab-Created Diamonds
Understanding the distinctions between simulated vs lab-created diamonds is crucial when selecting the right stone for your needs.
1. Composition & Durability
- Lab-grown diamonds are made of carbon atoms arranged in a crystalline structure, the same as natural diamonds.
- Simulants, like cubic zirconia (made from zirconium dioxide), are softer and more prone to scratches or chips.
2. Optical Properties
- Lab diamonds reflect light similarly to mined diamonds, offering the classic fire and sparkle.
- Simulated diamonds, depending on the material, may have higher dispersion or a “rainbow” effect. For example, Moissanite exhibits double refraction, while cubic zirconia often looks more brilliant but less sharp in sparkle.
3. Value & Longevity
- Lab-grown diamonds are considered valuable, durable, and suitable for heirloom jewelry.
- Simulants are more affordable upfront but may not retain their appearance or value over time due to their lower durability.
Popular Types of Diamond Simulants
If you’re still considering a stimulant, here are some of the most common materials:
Moissanite
- Nearly as hard as a diamond (9.25 on the Mohs scale)
- High brilliance and fire with a distinctive sparkle
- More affordable than lab diamonds
Cubic Zirconia (CZ)
- Highly reflective and clear
- Rates 8.5 on the Mohs scale, so it scratches more easily
- Heavier and often less durable than diamonds
Glass
- Least durable and least convincing visually
- Much softer than other stimulants and not suitable for daily wear
How to Tell the Difference Between Simulated and Lab-Grown Diamonds
Identifying the difference between simulated diamonds vs lab-grown can be challenging without expertise, but here are a few methods:
- Visual Inspection: Under magnification, simulants may display less sharp facets or colour dispersion. Moissanite may show double refraction.
- Professional Appraisal: Certified gemologists can verify the stone type and issue appropriate grading reports. Lab-grown diamonds are certified using the same standards as mined diamonds. Stimulants are not.
Which One Should You Choose?
The answer depends on your priorities:
- If you value authenticity, durability, brilliance, and long-term value, a lab-grown diamond is the clear winner.
- If you’re looking for a cost-effective alternative for a temporary or fashion-forward piece, a simulant like Moissanite or cubic zirconia might suit your needs.
Still unsure? At Nature Sparkle, we offer both natural and lab-grown diamond options to suit every preference and budget. Whether you’re selecting a centre stone for your engagement ring or investing in timeless fine jewelry, we’re here to help you find the perfect fit.
