Cubic Zirconica

Understanding the Sparkle of Cubic Zirconia: A Comprehensive Guide

Posted by Matt Anton

Cubic zirconia (CZ) is a popular gemstone known for its remarkable sparkle and affordability. While it may not be as valuable as a natural diamond, cubic zirconia’s brilliance is undoubtedly impressive. In this comprehensive guide, we will delve into the world of cubic zirconia sparkle, exploring the science behind it, comparing it to diamonds, and addressing common questions about this synthetic gemstone.

The Science Behind Cubic Zirconia Sparkle

Cubic zirconia is a lab-created gemstone made from zirconium dioxide crystals. What sets CZ apart and gives it its sparkle is its optical properties. The key factors contributing to its brilliance are:

Refractive Index

Cubic zirconia has a high refractive index, which means it can bend and reflect light more effectively than many other gemstones. This property is responsible for the gem’s vibrant play of colors and sparkling appearance.


Dispersion refers to the separation of white light into its spectral colors. CZ’s dispersion is impressive, creating flashes of color that are reminiscent of a diamond’s fire. This dispersion contributes significantly to its overall sparkle.

Cut and Faceting

The cut of a cubic zirconia gemstone plays a crucial role in its sparkle. Skilled gem cutters use precise angles and facets to maximize the gem’s brilliance and scintillation. A well-cut cubic zirconia will reflect and refract light beautifully.

Comparing Cubic Zirconia to Diamonds

Cubic zirconia is often used as a diamond simulant due to its remarkable sparkle. However, there are distinct differences between the two gemstones:


Diamonds are the hardest natural substance on Earth, ranking 10 on the Mohs scale of hardness. Cubic zirconia, while durable, is considerably softer and ranks around 8 on the Mohs scale. This means that CZ is more susceptible to scratches over time.


One of the most significant advantages of cubic zirconia is its affordability. It is a fraction of the cost of a natural diamond, making it an accessible option for those who desire the look of a diamond without the high price tag.


Cubic zirconia is known for its brilliant sparkle, but diamonds have a unique, unparalleled sparkle due to their exceptional optical properties and extreme hardness.

Factors Affecting Cubic Zirconia Sparkle

Several factors can influence the sparkle of a cubic zirconia gemstone:

Quality of Material

The purity and quality of the cubic zirconia crystal can affect its sparkle. High-quality CZ will exhibit better brilliance and scintillation.

Cut and Shape

The skill of the gem cutter and the chosen cut and shape of the CZ significantly impact its sparkle. Well-cut, faceted stones will shine more brightly.

Cleaning and Maintenance

Regular cleaning and care can help maintain the sparkle of cubic zirconia jewelry. Over time, oils, dirt, and debris can dull its brilliance.

Understanding the Sparkle of Cubic Zirconia: A Comprehensive Guide was last modified: November 19th, 2023 by Matt Anton