Moissanite vs. Cubic Zirconia - A Technical Perspective

Why Moissanite and Cubic Zirconia Are Often Confused

At first glance, moissanite and cubic zirconia can appear similar. Both are colorless, highly reflective, and commonly used as alternatives to diamonds.

The confusion typically arises because:

• both are laboratory-created

• both are transparent and visually brilliant

• both are frequently compared to diamonds

Beyond surface appearance, however, the similarities largely end.

Composition and Crystal Structure

Cubic Zirconia (CZ):

• chemical composition: zirconium dioxide (ZrO₂)

• structure: synthetic crystal

• originally developed as a diamond simulant

Moissanite:

• chemical composition: silicon carbide (SiC)

• structure: naturally occurring mineral (extremely rare), grown in laboratories

• a distinct gemstone category, not a diamond imitation

Key distinction:
Cubic zirconia was created to imitate diamonds.
Moissanite exists as its own gemstone with independent physical properties.

Brilliance and Optical Performance

Optical behavior is where differences become apparent over time.

Cubic Zirconia:

• lower refractive index

• brilliance diminishes with wear

• may develop a cloudy appearance over time

Moissanite:

• higher refractive index (approximately 2.65–2.69)

• strong fire and light dispersion

• maintains clarity and brilliance long-term

Moissanite’s optical performance remains stable even with frequent wear.

Hardness and Long-Term Durability

Durability is critical for fine jewelry worn regularly.

Cubic Zirconia:

• Mohs hardness: approximately 8–8.5

• more susceptible to scratches and surface wear

Moissanite:

• Mohs hardness: approximately 9.25

• highly resistant to scratching and chipping

As a result, moissanite is suitable for long-term daily wear, while cubic zirconia is not designed for the same lifespan.

Clarity Over Time

One of the most noticeable differences emerges after months or years of wear.

Cubic zirconia may lose brilliance due to:

• surface abrasion

• internal wear

• oil absorption

Moissanite retains:

• optical clarity

• light performance

• structural integrity

This distinction is particularly relevant for rings and jewelry worn daily.

Value and Intended Use

Cubic zirconia serves a specific role:

• affordable

• visually appealing initially

• suitable for fashion or temporary jewelry

Moissanite serves a different purpose:

• long-term durability

• suitability for fine jewelry

• balance between performance, ethics, and value

The distinction is less about price and more about intended use.

Why Glacier & Aurealis Does Not Use Cubic Zirconia

At Glacier & Aurealis, material selection prioritizes longevity, clarity, and craftsmanship.

We work exclusively with D-color, VVS1 moissanites, chosen for:

• optical stability

• durability

• suitability for everyday fine jewelry

Cubic zirconia does not meet these standards for long-term wear.

Choosing Based on Lifestyle

Choose cubic zirconia if:

• the piece is intended for short-term or occasional use

• longevity is not a priority

Choose moissanite if:

• jewelry is worn daily

• durability and clarity matter

• long-term performance and responsible sourcing are important

A Deliberate Distinction

Moissanite is not positioned against cubic zirconia.
It simply belongs to a different category.

Understanding this distinction enables informed, confident choices — based on material performance rather than assumptions.