Which Stone Is Right for You?

Cubic zirconia (CZ) is a lab-made gemstone that closely mimics a diamond's sparkle, at a fraction of the cost. It offers real brilliance, strong durability, and a wide colour range — making it the most practical choice for everyday jewellery. Glass crystal and lab-grown diamonds each serve a different purpose, at different price points.

Stone knowledge helps you choose with confidence. Whether you're buying for yourself or as a gift, understanding what creates that sparkle — and how long it lasts — makes for a smart, informed choice. This guide compares the three stones you're most likely to meet. If you're drawn to organic beauty rather than sparkle, our pearl guide is a natural companion read.

What Is Cubic Zirconia?

Cubic zirconia is a man-made gemstone and a diamond simulant — it closely resembles a natural diamond but uses a different material. It's made from zirconium dioxide rather than carbon. The word “cubic” refers to its crystalline structure, which mirrors a diamond's and delivers convincing sparkle.

CZ entered jewellery in the 1970s and quickly became a favourite for its brilliance and value. It's colourless by default, but trace metal oxides create a wide range of hues — from classic clear to deep blue and soft pink.

Durability is one of CZ's strongest qualities. Its hard, non-porous surface resists scratching and stays easy to clean, so jewellery holds its sparkle through everyday wear.

Here's what makes CZ a strong choice:

• Real brilliance. The sparkle closely resembles a diamond.
• Hard-wearing. A scratch-resistant surface keeps jewellery looking new.
• Wide colour range. Many shades suit classic and modern designs.
• Conflict-free. Lab-made, so nothing is taken from the earth.

What Is Glass Crystal in Jewellery?

Glass crystal is a softer, lower-cost alternative to CZ, widely used in costume jewellery where price matters more than long-term durability.

The trade-off shows in performance. Glass has a lower refractive index than CZ, so it returns less light — meaning less fire and less sparkle. It's also far softer, leaving it prone to scratching, chipping, and dulling.

• Lower price point. Glass suits budget costume lines.
• Less durable. Softer stones scratch and dull faster.
• Less sparkle. A lower refractive index returns less light.

What Are Lab-Grown Diamonds?

Lab-grown diamonds are real diamonds. They share the same chemical make-up as mined diamonds — pure carbon — grown in controlled conditions rather than extracted from the earth.

Because they're genuine diamonds, they carry the highest hardness and brilliance of the three. They also cost significantly more than CZ, though they're far more accessible than mined diamonds.

• Maximum brilliance. Genuine diamond sparkle for high-end jewellery.
• Top-tier durability. The hardest option available.
• A conscious premium. A more accessible route to a real diamond.

Cubic Zirconia vs Glass Crystal vs Lab-Grown Diamonds: How Do They Compare?

Each stone occupies a distinct tier for brilliance, durability, and price. Here's a clear side-by-side.

CZ suits people who want everyday sparkle and durability at an accessible price. Lab-grown diamonds work best for high-end investment jewellery. Glass crystal is best kept for occasional wear where price leads.

Why Does DANSK Copenhagen Use Cubic Zirconia?

DANSK Copenhagen uses cubic zirconia because it hits the balance that matters most for design-led, everyday jewellery — the same philosophy behind our move to 316L steel: beauty, durability, and honest value.

• Sparkle. Convincing, diamond-like brilliance in person.
• Durability. A hard, non-porous surface keeps jewellery looking new.
• Colour range. Trace metal oxides open a wide, creative palette.
• Sustainability. Lab-made and conflict-free.
• Fair price. Accessible cost keeps DANSK Copenhagen jewellery affordable without compromise.

CZ gives you the look and longevity you want, without a premium barrier. That's why it's the right choice for DANSK Copenhagen's collections — beautiful jewellery, designed to last, at a price you can say yes to. If you're drawn to something more organic, our pearl guide is another great place to explore how DANSK Copenhagen chooses materials with the same honest approach.

FAQ

Is cubic zirconia the same as a diamond?
No, but it closely resembles one. CZ is made from zirconium dioxide, while diamonds are carbon. CZ delivers similar sparkle at a fraction of the cost, making it the most practical diamond simulant for everyday jewellery.

Will cubic zirconia lose its sparkle over time?
With simple care, CZ holds its sparkle well. Its hard, non-porous surface resists scratching better than glass crystal. Wipe it with a soft cloth and avoid harsh chemicals to keep it looking its best.

Does DANSK Copenhagen use real diamonds?
DANSK Copenhagen uses cubic zirconia across its collections. CZ delivers diamond-like brilliance at an accessible, fair price — exactly the balance DANSK Copenhagen designs for. It's lab-made, conflict-free, and designed to last.

Can you tell CZ and a diamond apart with the naked eye?
For most everyday jewellery, the difference is minimal at a glance. A trained gemologist with tools can tell them apart, but in a well-made design, CZ delivers genuinely compelling sparkle and clarity.

Explore DANSK Copenhagen's cubic zirconia collection and discover your new everyday favourite.