What is a simulated gemstone?
By Jared James · Last updated 21 May 2026
Definition
A simulated gemstone is a material made to look like a natural gem but with a different chemical composition altogether. Cubic zirconia simulates a diamond, for instance, and synthetic spinel is sometimes used to simulate sapphire. Unlike a lab grown gemstone, which has the same chemical and physical structure as the natural version, a simulant is simply a visual stand-in. Simulants are much more affordable than natural or lab grown stones and are widely used in fashion jewellery.
Frequently asked questions
- What is the difference between a simulated and a lab grown gemstone?
- A lab grown gemstone has exactly the same chemical and physical properties as the natural version, it is simply made in a laboratory rather than mined. A simulant just looks similar but is made from a different material entirely, so a cubic zirconia is a diamond simulant but it is not a diamond in any scientific sense.
- What is the most common diamond simulant?
- Cubic zirconia is the most widely used diamond simulant, followed by moissanite. Both have their own properties; moissanite is actually harder and more brilliant than cubic zirconia, and some people prefer it specifically for its sparkle.
- Are simulated gemstones worth buying?
- They make sense if you want a certain look at a low price point and are happy knowing the material is not the natural gem. They are popular in fashion jewellery, and high-quality simulants can look very convincing in everyday wear.
Designing a ring
Talk through simulated gemstone with us
Tell us what you have in mind, even if it is only a budget and a piece of jewellery type, and we will help you weigh up the options. We reply to every enquiry, usually within one business day.
Contact the studio