If you are investing in a fine jewelry piece, durability is a top concern, and you may be wondering: does moissanite scratch? The short answer is that moissanite is one of the most scratch-resistant gemstones on earth, but it is not completely immune. Understanding the facts about moissanite's hardness, how it compares to other gemstones, and what can actually scratch it will help you make an informed decision and care for your jewelry properly.
In this guide, we will break down the science behind moissanite's durability, compare it to diamond and other popular stones, and explain what you need to do to keep your moissanite looking flawless.
Does Moissanite Scratch? The Straight Answer
Moissanite ranks 9.25 on the Mohs scale of mineral hardness, making it the second-hardest gemstone used in jewelry, behind only diamond at 10. This exceptional hardness means that everyday materials cannot scratch moissanite. Dust, sand, metal, glass, and most other substances you encounter in daily life are significantly softer than moissanite and will not leave a mark.
However, no gemstone is entirely scratch-proof. Moissanite can be scratched by two things: a diamond (which is harder) and another moissanite stone. In practical terms, this means you should avoid storing your moissanite jewelry loose alongside diamonds or other moissanite pieces, but you do not need to worry about normal daily activities scratching the stone.
Understanding the Mohs Hardness Scale
The Mohs scale measures a mineral's resistance to scratching on a scale from 1 (talc, the softest) to 10 (diamond, the hardest). Each level can scratch the level below it but not the level above it.
| Mohs Hardness | Gemstone / Material | Scratch Resistance |
|---|---|---|
| 10 | Diamond | Exceptional, virtually scratch-proof |
| 9.25 | Moissanite | Excellent, nearly scratch-proof |
| 9 | Sapphire, Ruby | Excellent |
| 8 | Topaz | Very good |
| 7.5 | Emerald | Good |
| 7 | Quartz (includes most dust and sand) | Good |
| 6–6.5 | Feldspar, Tanzanite | Moderate |
| 5.5–6 | Glass, steel knife blade | Moderate |
| 3–4 | Gold, pearl, opal | Low (these can be scratched easily) |
As the table shows, moissanite sits between sapphire (9) and diamond (10). Only materials rated above 9.25 can scratch moissanite, and in practical jewelry contexts, that means only diamonds and other moissanite stones pose a scratching risk.
Moissanite vs. Diamond: Scratch Resistance Compared
The most common durability comparison is between moissanite and diamond. On the Mohs scale, the difference between 9.25 and 10 may seem small, but the scale is not linear. Diamond is approximately four times harder than the next hardest natural material (corundum, which includes sapphire and ruby at 9). This means diamond is significantly harder than moissanite.
| Property | Moissanite | Diamond |
|---|---|---|
| Mohs Hardness | 9.25 | 10 |
| Scratch Resistance | Excellent | Exceptional |
| Can be scratched by | Diamond, other moissanite | Only another diamond |
| Chip Resistance | Very good | Very good |
| Daily wear durability | Excellent | Excellent |
In practical, everyday terms, both moissanite and diamond are equally suitable for daily wear. Neither will scratch from normal activities. The difference only matters if you store diamonds and moissanite together, where the diamond could scratch the moissanite.
What Can Actually Scratch Moissanite?
To put does moissanite scratch into practical perspective, here is what can and cannot scratch the stone:
Can Scratch Moissanite
- Diamond: Any diamond-tipped tool, a loose diamond ring stored against your moissanite, or industrial diamond abrasives
- Another moissanite stone: Two moissanite pieces rubbing against each other can cause micro-scratches over time
Cannot Scratch Moissanite
- Everyday dust and sand (quartz, Mohs 7)
- Metal objects (steel, gold, platinum, silver)
- Glass (Mohs 5.5)
- Nails, keys, and household items
- Ceramic and porcelain
- Most other gemstones (sapphire, emerald, topaz, etc.)
This means you can wear a moissanite ring through virtually any daily activity without worrying about scratching the stone itself. The metal setting is actually the more vulnerable component. For protecting the setting, see our moissanite care guide.
Moissanite's Resistance to Chipping and Breaking
Scratch resistance is only one aspect of durability. Another important factor is toughness, which refers to a gemstone's resistance to chipping, cracking, and breaking. Moissanite has excellent toughness due to its crystal structure, but like all gemstones, it can chip if struck hard enough at the right angle.
The most vulnerable points on any faceted gemstone are the culet (the bottom point) and the facet junctions (where two flat surfaces meet at an edge). A direct impact on these points can cause a chip. However, in a well-made setting, the metal prongs protect these vulnerable areas.
Tips to Prevent Chipping
- Choose a protective setting like a bezel or half-bezel for maximum security
- Ensure prongs fully cover the culet and girdle
- Remove the ring during high-impact activities
- Have prongs inspected annually to ensure they have not worn down
Does Moissanite Scratch More Over Time?
A common question related to does moissanite scratch is whether the stone becomes more susceptible to scratching as it ages. The answer is no. Moissanite's hardness is a fundamental property of its crystal structure and does not degrade over time. A moissanite stone will be just as hard and scratch-resistant in fifty years as it is today, provided it has not been damaged by a harder material.
If your moissanite appears to have surface marks after years of wear, these are likely on the metal setting, not the stone. A professional cleaning and polishing will restore the ring to its original condition. For more on long-term appearance, read our article does moissanite get cloudy.
How to Protect Your Moissanite from Scratching
While moissanite is highly scratch-resistant, a few simple habits will keep it flawless:
Store Jewelry Separately
The most common cause of moissanite scratches is contact with diamonds or other moissanite stones during storage. Always store each piece in its own compartment or soft pouch. See our guide to storing moissanite for detailed storage strategies.
Avoid Wearing Rings Together
If you wear a diamond ring and a moissanite ring on the same finger, the two stones can contact each other and cause scratching. If you must wear multiple rings, ensure they do not touch at the stone level, or choose a stack designed with spacer bands.
Remove Before High-Risk Activities
While moissanite resists scratching from most materials, hard impacts during activities like rock climbing, weightlifting, or construction work can damage the setting and expose the stone to risk. Remove your ring during these activities.
Clean Regularly
Cleaning removes abrasive particles that could accumulate in the setting. While these particles cannot scratch the moissanite, they can scratch the softer metal. Follow our step-by-step cleaning guide for best results.
What to Do If Your Moissanite Gets Scratched
If your moissanite does somehow get scratched, the good news is that most scratches can be polished out by a professional gem cutter or lapidary. Because moissanite is lab-created, replacement is also an affordable option compared to replacing a diamond. Check whether your stone is covered under a moissanite warranty before seeking repair.
Minor surface scratches that do not affect the stone's structural integrity often disappear after professional repolishing. Deep scratches or chips may require recutting the stone, which is more involved but still possible.
Moissanite Durability FAQ
Can I wear my moissanite ring every day?
Yes. Moissanite's 9.25 hardness makes it ideal for everyday wear. It will not scratch from normal daily activities.
Will sand scratch my moissanite?
No. Sand is primarily quartz (Mohs 7), which is softer than moissanite (9.25). Sand cannot scratch moissanite.
Can a knife scratch moissanite?
No. Steel knife blades rate around 5.5 on the Mohs scale, far below moissanite's 9.25.
Is moissanite durable enough for an engagement ring?
Absolutely. Moissanite is one of the most durable gemstone options for engagement rings, second only to diamond. It withstands daily wear exceptionally well. If you ever need a size adjustment, see our guide on can moissanite be resized.
Conclusion: Moissanite Is Built for Everyday Life
So, does moissanite scratch? Only under rare circumstances involving contact with a diamond or another moissanite stone. For all practical purposes, moissanite is virtually scratch-proof and more than durable enough for a lifetime of daily wear. Its 9.25 Mohs hardness places it firmly in the top tier of gemstone durability, far exceeding sapphire, emerald, and all other common jewelry stones.
By storing your jewelry properly and maintaining a simple care routine, you can keep your moissanite looking flawless forever. The metal setting will age and scratch long before the stone ever does, and even that is easily managed with professional polishing.
Want to keep your moissanite in pristine condition? Read our complete moissanite care guide and learn how to clean moissanite to maintain maximum brilliance for years to come.