Cubic Zirconia and Diamonds - What is The Difference?

When it comes to jewelry, diamonds have always been the epitome of luxury and elegance. However, in recent years, cubic zirconia has gained popularity as a more affordable alternative. But what exactly is the difference between these two gemstones? Let's take a closer look.

What are Cubic Zirconia and Diamonds?

Cubic zirconia (CZ) is a synthetic gemstone made from zirconium dioxide. It was first developed in the 1970s as a diamond simulant, and its optical properties closely resemble those of a diamond. On the other hand, diamonds are natural gemstones formed deep within the Earth's mantle over millions of years.

Composition and Hardness

One of the key differences between cubic zirconia and diamonds lies in their composition and hardness. Cubic zirconia is a man-made material, while diamonds are formed naturally. Diamonds are composed of carbon atoms arranged in a crystal lattice structure, which gives them their exceptional hardness. In fact, diamonds are the hardest known substance on Earth, scoring a perfect 10 on the Mohs scale of mineral hardness. Cubic zirconia, although durable, is softer than diamonds and ranks at around 8-8.5 on the Mohs scale.

Optical Properties

When it comes to brilliance and sparkle, diamonds have a distinct advantage. Due to their unique crystal structure and refractive index, diamonds have unparalleled brilliance and fire. They reflect and refract light in a way that creates a dazzling display of colors. Cubic zirconia, while still quite brilliant, does not possess the same level of optical properties as diamonds.

Price and Affordability

One of the main reasons why cubic zirconia has gained popularity is its affordability. Compared to diamonds, cubic zirconia is significantly less expensive. This makes it a more accessible option for those who desire the look of a diamond without the hefty price tag. However, it's important to note that the value of diamonds is not solely based on their beauty but also on their rarity and durability.


In summary, cubic zirconia and diamonds may look similar at first glance, but they have distinct differences. Diamonds are natural gemstones with exceptional hardness and optical properties, while cubic zirconia is a synthetic material that closely resembles a diamond's appearance. While cubic zirconia offers an affordable alternative, diamonds continue to be prized for their rarity and enduring value. Whether you choose a diamond or cubic zirconia, both can add a touch of elegance and beauty to any piece of jewelry.


On our website, you'll find an extensive selection of cubic zirconia (CZ) jewelry that cater to all tastes and preferences. From delicate necklaces, bracelets, earrings, statement and wedding rings, we have something to suit every occasion.

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