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Moissanite vs Diamond: The Ultimate Comparison

Nov 02,2022

When it comes to engagement rings and fine jewelry, there are two popular choices for gemstones: moissanite and diamond. While both are beautiful, they have distinct differences that you should be aware of before making your final decision. In this guide, we'll explore the differences between moissanite and diamond, including their chemical makeup, physical properties, and value.

Moissanite vs Diamond

Chemical Makeup

Moissanite is a naturally occurring mineral that was first discovered in 1893 by French scientist Henri Moissan. It is composed of silicon carbide and has a chemical formula of SiC. On the other hand, diamonds are composed of pure carbon and have a chemical formula of C. This fundamental difference in chemical makeup has a significant impact on the physical properties of the two gemstones.

Physical Properties

Moissanite and diamond have different physical properties that make them unique. Moissanite is almost as hard as diamond, scoring a 9.25 on the Mohs scale of hardness, while diamond scores a perfect 10. Moissanite has a higher refractive index than diamond, which means that it has more brilliance and fire. Diamond, on the other hand, has a higher dispersion than moissanite, which means that it has more color flashes. Moissanite is also less dense than diamond, which makes it slightly lighter.


When it comes to value, there are significant differences between moissanite and diamond. Moissanite is a lab-created gemstone that is significantly less expensive than a diamond. This is because it is easier to produce in a lab than to mine a diamond from the earth. However, while moissanite is less expensive, it does not hold its value like a diamond does. Diamonds are considered a long-term investment and can be passed down through generations as family heirlooms. They also hold their value over time, while moissanite does not.

Related Reading:

Moissanite vs Lab Diamond

Moissanite vs Cubic Zirconia


In conclusion, both moissanite and diamond are beautiful gemstones that have their own unique properties. Moissanite is less expensive and has more brilliance, while diamond is more valuable and holds its value over time. When deciding between the two, it ultimately comes down to personal preference and budget. If you're looking for a budget-friendly option with lots of sparkles, moissanite is an excellent choice. If you're looking for a long-term investment that holds its value, a diamond is the way to go.