Is Moissanite Durable? The Truth About Its 9.25 Mohs Hardness Rating

When searching for the perfect gemstone for an engagement ring or everyday fine jewelry, brilliant shine and exceptional durability are non-negotiable. Moissanite has exploded in popularity as a breathtaking alternative to mined diamonds, beloved for its insane rainbow fire and eco-friendly origins. But one big question always tops every buyer's list: Will Moissanite hold up to daily wear, or will it scratch and dull over time?

Understanding a gemstone's physical strength is essential before making an investment. In this guide, we reveal the truth behind Moissanite's impressive 9.25 Mohs hardness score, see how it stacks up against diamonds and sapphires, and explain why it is built to last a lifetime.

What Is the Mohs Hardness of Moissanite?

Moissanite scores an astounding 9.25 on the Mohs Hardness Scale.

To put that into perspective, the Mohs scale ranks minerals from 1 (softest, like Talc) to 10 (hardest, like Diamond) based on their scratch resistance. Sitting at 9.25, Moissanite is the second-hardest gemstone used in fine jewelry today.

Key Takeaway: Because Moissanite is composed of silicon carbide (SiC), its incredibly strong covalent atomic bonds make it naturally impervious to common household scratches.

Moissanite vs. Other Gemstones: How Does It Compare?

To truly see how resilient Moissanite is, let's compare its hardness rating with other popular jewelry stones:

• Diamond (Mohs 10): The hardest natural substance known on Earth.

• Moissanite (Mohs 9.25): The second-hardest gemstone, outperforming almost all natural colored gems.

• Sapphire & Ruby (Mohs 9): Extremely hard and durable corundum family minerals.

• Emerald (Mohs 7.5 - 8): Moderately hard, but often brittle due to natural inclusions.

• Cubic Zirconia / CZ (Mohs 8 - 8.5): Scratches and clouds easily over a few years of regular wear.

• Quartz / Household Dust (Mohs 7): Micro-particles in everyday dust will scratch softer stones over time.

Because Moissanite far exceeds the 7-rating threshold of everyday household dust and metal objects like keys or utensils, it will never get scratched by normal daily exposure.

Will Moissanite Scratch, Cloud, or Turn Cloudy?

No, a genuine Moissanite will never become cloudy or lose its brilliance.

When cheap fake diamonds (like Cubic Zirconia) become hazy over time, it is because their softer surface (Mohs 8) gets covered in microscopic scratches that trap oil and dirt.

Because Moissanite ranks at 9.25:

• Scratch Resistance: Outstanding. Only a diamond or another Moissanite can scratch its surface.

• Heat Resistance: Higher than diamonds. Moissanite can withstand temperatures up to 1100℃ without losing color or optical clarity.

• Oil Resistance: Unlike diamonds, which act like grease magnets, Moissanite repels oil and dirt much better, staying cleaner and brighter for longer.

Is Moissanite Durable Enough for an Engagement Ring?

Yes, absolutely. Moissanite is arguably one of the best gemstones on Earth for an engagement ring intended for lifetime wear.

Jewelers categorize durability into Hardness (scratch resistance) and Toughness (resistance to chipping or breaking):

• Hardness: Top-tier. You can wear your ring while cooking, typing, or doing chores without fear.

• Toughness: Phenomenal. Silicon carbide is structurally more fracture-resistant than natural diamonds, meaning it handles accidental bumps against granite countertops or metal doors with ease.

How to Clean and Maintain Your Moissanite Ring

Although Moissanite is virtually indestructible in daily life, routine cleaning keeps its high refractive index (2.65 - 2.69) shining like new:

1. Easy Warm Water Scrub

Mix mild dish soap with warm water. Use a soft-bristled toothbrush to gently scrub the underside of the setting where lotion and soap scum build up. Rinse thoroughly and pat dry with a microfiber cloth.

2. Ultrasonic Cleaners

Because Moissanite possesses incredible structural toughness and lacks internal heat sensitivity, it is 100% safe to clean in home ultrasonic jewelry cleaners.

3. Smart Storage

Even though Moissanite won't be scratched by other items in your jewelry box, it can scratch softer metals and softer gemstones like amethysts or opals. Store your ring in its own fabric pouch or ring box.

Final Thoughts: Is Moissanite Worth It?

If you want a gemstone that combines world-class durability, ethical lab-grown sourcing, unmatched rainbow brilliance, and an accessible price point, Moissanite is unbeatable. Rated 9.25 on the Mohs scale, it easily survives the test of time while keeping its blinding sparkle forever.

Ready to find your forever sparkle? Explore our signature collection of handcrafted Moissanite engagement rings today.