Articles and News

Midland, TX--Cubic zirconia and diamonds can look similar in jewelry but differ in light behavior, durability, and suitability for specific designs, according to a blog post by Cathy Eastham Fine Jewelry.

[Image via iStock.com/fottograff]

The post identifies sparkle as the clearest visual distinction. Diamonds produce controlled brilliance with bright white flashes, sharp reflections, and a balanced mix of brilliance and fire. Their facets remain crisp over time. Cubic zirconia, by contrast, shows stronger rainbow flashes, softer reflections, and a glassier appearance with lower contrast between light and dark areas.

Facet definition is another differentiator. Diamond facets appear sharp and clearly defined, while cubic zirconia facets can look slightly rounded. Aging also differs: diamonds retain clarity and edge definition for decades, whereas cubic zirconia may develop scratches or cloudiness with frequent wear, according to the post.

The article stated that these characteristics influence design choices. Diamonds are typically used for pieces that require durability, long-term brilliance, and refined detailing, including engagement rings and jewelry intended for everyday wear. Cubic zirconia is more often used for statement pieces, larger center stones at lower cost, fashion-driven designs, and occasional wear.

The post noted that diamonds and cubic zirconia serve different roles in jewelry design, rather than interchangeable purposes, and understanding these differences helps align expectations regarding appearance, longevity, and use.

Read the blog post by Cathy Eastham Fine Jewelry here.