Does Moissanite Oxidize? 2025

If you’ve ever admired the brilliance of moissanite jewelry, you’ve probably wondered how it holds up over time. As someone who’s spent years studying and testing gemstones for the fine jewelry industry, I often get asked: does moissanite oxidize? The short answer is no—moissanite does not oxidize like some metals or gemstones might. But there’s more to the story, and understanding it will help you care for your jewelry and make informed buying decisions.

Unlike silver, which tarnishes, or certain gemstones that lose luster with exposure to air, moissanite is composed of silicon carbide (SiC), a remarkably stable compound. Its chemical durability means it resists reactions with oxygen, humidity, or daily wear conditions. That’s one of the many reasons moissanite has become a sought-after diamond alternative: it doesn’t just sparkle—it endures.

In this guide, I’ll unpack the science behind moissanite’s stability, compare it with other popular gems, and share practical tips for keeping your stones radiant for decades. Whether you’re a jeweler, collector, or simply shopping for your first piece, you’ll come away with a confident understanding of why moissanite is trusted worldwide for brilliance, affordability, and longevity.

Let’s dive into the details of what makes moissanite so resistant to oxidation—and why that matters for your investment in fine jewelry.

Moissanite Bracelets | Shop Now

Moissanite Best Sellers | Moissanite Engagement Ring Band Sets | Moissanite Matching His & Hers Rings | Moissanite Rose Gold Wedding Sets | Moissanite White Gold Wedding Sets | Moissanite Affordable Sets | Moissanite Pendant Studs | Moissanite Clustered Sets | Moissanite Set | Moissanite Art Deco Jewelry Sets

What Is Oxidation in Jewelry?

Before we address moissanite specifically, let’s define oxidation in jewelry. Oxidation occurs when a material reacts with oxygen in the environment, often accelerated by moisture, heat, or chemicals. In metals, this can result in tarnish, discoloration, or rust. In gemstones, oxidation can sometimes alter surface coloration or clarity.

• Metals: Silver oxidizes into black silver sulfide, while copper forms green patina.

• Gemstones: Some, like iron-rich garnets, may oxidize under certain conditions, leading to dullness.

• Jewelry impact: Oxidation generally reduces visual appeal and requires polishing or treatments to restore brilliance.

Understanding this process makes it clear why the resistance of moissanite gemstones to oxidation is such a valuable feature.

Why Moissanite Does Not Oxidize

The stability of moissanite lies in its chemical composition: silicon carbide. This compound forms extremely strong bonds, making the gemstone resistant to environmental reactions.

• High thermal stability – Moissanite can withstand high heat (up to ~2,000°C) without altering chemically.

• Chemical resistance – It does not react with air, household chemicals, or skin oils.

• Hardness & density – Ranking 9.25 on the Mohs scale, moissanite is second only to diamond in hardness, further protecting it from surface degradation.

In other words, moissanite maintains its clarity, color, and brilliance indefinitely without risk of oxidation.

Moissanite Sets | Shop Now

Moissanite Nature Inspired Jewelry Sets | Moissanite Toi et Moi Jewelry Sets | Moissanite Engagement Ring | Moissanite Wedding Band | Moissanite Eternity Ring | Moissanite Promise Ring | Moissanite 3 Stone Ring | Moissanite Stackable Ring | Moissanite Oval Cut Ring | Moissanite Emerald Cut Ring 

Comparing Moissanite With Other Gemstones

To truly appreciate moissanite’s advantages, let’s compare its durability with other common gemstones:

Diamonds

• Like moissanite, diamonds are carbon-based and do not oxidize under normal conditions.

• Both are stable, but moissanite is less prone to attracting dirt and oils, which can dull sparkle.

Cubic Zirconia (CZ)

• CZ is softer (8–8.5 Mohs) and more porous.

• Over time, CZ can absorb oils and discolor, unlike moissanite which resists such changes.

Sapphires & Rubies

• Aluminum oxide-based stones, highly stable.

• They don’t oxidize but may be subject to surface scratches more than moissanite.

Opals & Pearls

• Organic-based gems are far more vulnerable to oxidation, dehydration, and discoloration.

• These require special care compared to moissanite.

Conclusion: Moissanite belongs in the same league as diamond and sapphire when it comes to chemical stability—making it a superior long-term choice.

Does Moissanite Tarnish or Change Color?

A common misconception is that moissanite might yellow or fade over time. The truth is:

• Authentic moissanite never loses color or oxidizes.

• Older generations of stones sometimes had a slight yellow/green tint due to growth methods, not oxidation.

• Modern lab-grown moissanite is nearly colorless and stable for life.

What can happen is temporary dullness caused by surface residue—like lotion, soap, or oils—which can be easily cleaned.

Moissanite Necklaces | Shop Now

Moissanite Cushion Cut Ring | Moissanite Round Cut Ring | Moissanite Heart Shaped Ring | Moissanite Princess Cut Ring | Moissanite Pear Cut Ring | Moissanite Marquise Cut Ring | Moissanite Asscher Radiant Cut Ring | Moissanite Pearl Earrings | Moissanite Rose Gold Ring | Moissanite Yellow Gold Ring 

Caring for Moissanite Jewelry

While moissanite does not oxidize, caring for your jewelry properly ensures it maintains its maximum brilliance.

Daily Care

• Avoid buildup: remove jewelry before applying heavy lotions or hair products.

• Quick rinse: wash with warm soapy water and a soft brush.

Professional Cleaning

• Ultrasonic and steam cleaners are safe for moissanite (unlike some softer gems).

• Jewelers can restore your ring’s sparkle within minutes.

Storage

• Store separately: although very hard, moissanite can scratch softer gems.

• Use lined jewelry boxes or soft pouches.

The Long-Term Investment Value of Moissanite

From an investment standpoint, moissanite’s non-oxidizing nature adds to its appeal:

• Everlasting brilliance: no tarnish or chemical wear.

• Lower maintenance costs: no need for special treatments.

• Sustainability: unlike mined gems, moissanite is lab-created, eco-friendly, and conflict-free.

Over the years, I’ve seen countless couples and collectors choose moissanite not only for its affordability but also for the peace of mind that comes with knowing their stone will look as stunning in 30 years as it does today.

Moissanite Earrings | Shop Now

Moissanite White Gold Ring | Moissanite Sterling Silver Ring | Moissanite Platinum Ring | Moissanite Black Ring | Moissanite Men Ring | Moissanite Solitaire Necklaces | Moissanite Tennis Necklaces | Moissanite Cross Necklaces | Moissanite Choker Necklaces | Moissanite Name Initial Pendants

Key Takeaways

• Moissanite does not oxidize. Its silicon carbide composition is chemically stable.

• Unlike metals or softer gems, moissanite won’t tarnish, fade, or lose brilliance.

• Regular cleaning keeps it radiant, but it requires less maintenance than many alternatives.

• With durability rivaling diamonds, moissanite is a secure and sustainable choice for fine jewelry.

   

  Moissanite Engagement Rings | Shop Now

  

  Moissanite Heart Necklaces | Moissanite Cluster Necklaces | Moissanite Halo Pendant Necklaces | Moissanite Teardrop Drop Necklaces | Moissanite Circle Bezel Pendants | Moissanite Pearl Necklaces | Moissanite Men Necklace | Moissanite Cuban Link Chains | Moissanite Dog Tag Necklaces | Moissanite Rose Gold Necklaces

    

Final Thoughts

So, does moissanite oxidize? Absolutely not. As a jewelry writer and specialist, I can confidently say that one of the greatest strengths of moissanite is its permanence. When you invest in moissanite jewelry—whether it’s an engagement ring, pendant, or bracelet—you’re choosing a gem that will outlast trends, resist environmental wear, and keep its fire forever.

Moissanite Necklace Collections

 Moissanite White Gold Necklaces | Moissanite Necklace Yellow Gold | Moissanite Sterling Silver 925 Necklaces | Moissanite Stud Earrings | Moissanite Hoop Earrings | Moissanite Drop Dangle Earrings | Moissanite Cluster Earrings | Moissanite Leverback Earrings | Moissanite Screw Back Earrings | Moissanite Round Cut Studs

Moissanite Earrings Collections

Moissanite Princess Cut Earrings | Moissanite Emerald Radiant Cut Earrings | Moissanite Pear Teardrop Earrings | Moissanite 1 Carat Earrings | Moissanite 2 Carat Earrings | Moissanite 3 Carat Earrings | Moissanite White Gold Earrings | Moissanite Rose Gold Earrings | Moissanite Sterling Silver 925 Earrings | Moissanite Men Earrings 

Moissanite Bracelets Collections

Moissanite Tennis Bracelets | Moissanite Cuban Link Bracelets | Moissanite Bangle Bracelets | Moissanite Cross Bracelets | Moissanite Pearl Bracelets | Moissanite Rose Gold Bracelets | Moissanite White Gold Bracelet | Moissanite Sterling Silver 925 Bracelets | Moissanite Men Bracelet | Moissanite Men Tennis Chain Cuff Bracelet 

Moissanite Watches Collections

Moissanite Watch