Will Moissanite Lose Its Sparkle Over Time? The Real Answer

Published: July 18, 2026 Reading Time: 9 min Part 6 of the Zalkari Moissanite and Lab Grown Diamond Series

No. Moissanite does not lose its sparkle over time. The optical properties of silicon carbide its refractive index of 2.65 to 2.69, its dispersion of 0.104, its crystal structure are stable characteristics of the material itself. They do not diminish with age, with exposure to light, with temperature changes, or with daily wear. A moissanite stone that looks brilliant today will look exactly as brilliant in ten years and twenty years, assuming it is cleaned regularly and has not been physically damaged.

This is one of the most important practical differences between moissanite and cubic zirconia the material most people are thinking of when they worry about gemstone alternatives losing their brilliance. CZ clouds because it is porous and absorbs oils. Moissanite does not cloud because it is not porous. The confusion between these two very different materials is responsible for most of the sparkle-longevity skepticism directed at moissanite.

This guide covers exactly why moissanite maintains its optical properties permanently, what can make a moissanite temporarily look dull, how to restore full brilliance instantly, and how moissanite's long-term performance compares to both natural diamond and cubic zirconia.

Why Moissanite Does Not Lose Its Brilliance

Brilliance in a gemstone comes from two sources: the refractive index of the material and the quality of the cut. The refractive index is a fixed property of the material's atomic structure. Silicon carbide's crystal structure produces a refractive index of 2.65 to 2.69, and that number does not change over time. It cannot be worn away, diminished by light exposure, or altered by normal environmental conditions.

The cut the arrangement of facets that directs light through the stone is a physical characteristic of the finished stone. Unless the stone is physically damaged by chipping or scratching, the facets remain exactly as the lapidary cut them. A well-cut moissanite maintains its light performance permanently.

Compare this to cubic zirconia. CZ has a lower refractive index (2.15 to 2.18) to begin with, and it is porous its crystalline structure allows microscopic oil molecules to penetrate the surface and accumulate over time. This buildup of oils and environmental particles progressively obscures the stone's facets and reduces the light entering and exiting the stone. A CZ stone that looks bright at purchase genuinely does look duller after a year of daily wear, not because its optical properties changed, but because its surface is obscured. Cleaning restores some brilliance temporarily, but the porous structure continues to absorb oils and the dullness returns faster each time.

Moissanite's silicon carbide crystal structure is non-porous. Oils and environmental particles sit on the surface rather than penetrating it. A simple clean warm water with mild dish soap and a soft brush removes surface deposits completely and restores the full original brilliance every time. There is no progressive degradation. The hundredth cleaning is as effective as the first.

What Can Make Moissanite Look Temporarily Dull

If a moissanite looks less bright than it did when new, the cause is almost always surface contamination rather than any change in the stone itself.

Skin oils from daily wear deposit on the stone's surface over time. Body lotions, hand creams, sunscreen, and cosmetics all leave residue that accumulates on every surface of the ring including the stone. This residue reduces light entry into the stone and mutes brilliance temporarily.

Soap residue from handwashing can paradoxically leave a film on a ring that dullness its appearance. Many soaps leave a thin residue when not thoroughly rinsed, and this residue catches light differently than the clean stone surface.

Hard water mineral deposits calcium and magnesium from tap water accumulate as a chalky white film on jewelry over time, particularly in areas with hard water. This film is more resistant to simple rinsing than oil residue and may require a brief soap soak and brush to remove fully.

Hairspray, perfume, and other aerosol products contain compounds that deposit on jewelry surfaces and contribute to surface film.

None of these causes represents any change in the moissanite stone itself. They are all surface deposits that cleaning removes completely.

How to Keep Moissanite Looking Its Best

The cleaning approach for moissanite is straightforward and does not require any special products.

For routine maintenance every one to two weeks for daily-wear pieces fill a small bowl with warm water and add a few drops of mild dish soap. Soak the piece for five to ten minutes. Use a soft toothbrush to gently scrub the stone's surface and the setting, paying particular attention to the underside of the stone where oils accumulate behind the facets. Rinse thoroughly under clean cool water and dry with a lint-free cloth.

This process removes all surface deposits and restores full brilliance every time. It takes about five minutes and costs nothing beyond the dish soap and a soft brush.

For occasional deeper cleaning if the ring has accumulated more significant residue or has not been cleaned for an extended period extend the soak time to fifteen to twenty minutes and be more thorough with the brushing around the setting and behind the stone.

What to avoid: ultrasonic cleaners are generally safe for moissanite itself, but can loosen prong settings or damage certain setting styles over repeated use. Steam cleaners are fine for the stone but may damage soft metals or settings with adhesive. Harsh chemicals including bleach, ammonia, and acetone should be avoided entirely they will not damage the moissanite stone but can damage the metal setting.

The general silver care principles from our earlier series apply to the metal setting: How to Clean Sterling Silver Jewelry at Home covers the methods in full detail.

Long-Term Performance: Moissanite vs Diamond vs Cubic Zirconia

Over a ten-year daily wear period, here is how the three materials compare on long-term brilliance.

Natural diamond: maintains its optical properties permanently. Diamond is non-porous and chemically stable. Surface cleaning restores full brilliance. Physical damage chips from impact can affect appearance but is uncommon in normal wear. After ten years of daily wear with regular cleaning, a well-cut diamond looks essentially the same as when purchased.

Moissanite: maintains its optical properties permanently. Same fundamental behavior as diamond in terms of brilliance longevity. Non-porous, chemically stable, responds to cleaning with full restoration. After ten years of daily wear with regular cleaning, a moissanite looks the same as when purchased.

Cubic zirconia: deteriorates progressively. Porous structure allows oils to penetrate the surface layer over time. Even with regular cleaning, the surface becomes increasingly difficult to restore fully as the porosity deepens. After one to two years of daily wear, CZ noticeably lacks the brilliance it had at purchase. After five years, the difference from a new stone is significant.

The practical takeaway: moissanite and diamond are equivalent in long-term brilliance longevity. CZ is not comparable on this dimension. If you are choosing between moissanite and CZ, long-term brilliance is one of the most decisive factors in favor of moissanite.

Does the Sterling Silver Setting Affect the Stone's Appearance?

The metal setting affects the appearance of the ring overall but not the optical properties of the moissanite stone itself. However, a tarnished or dull metal setting creates a visual context that makes even a perfectly clean stone look less bright by comparison.

Sterling silver settings benefit from the same care as any sterling silver jewelry regular cleaning to remove tarnish, proper storage in anti-tarnish pouches, removal before swimming and harsh chemical exposure. A well-maintained sterling silver setting frames the moissanite beautifully. A tarnished setting undermines the stone's visual impact even when the stone itself is clean.

The full maintenance guide for sterling silver including how to prevent tarnish, the three cleaning methods by tarnish level, and the storage system is in our comprehensive care guide: The Ultimate Sterling Silver Jewelry Care Guide.

Frequently Asked Questions

Does moissanite get cloudy over time? No. Moissanite is non-porous and does not absorb oils or environmental particles into its structure. What can appear as cloudiness is surface contamination oils, lotion residue, hard water deposits that sits on the surface and is completely removed by cleaning. The stone itself does not cloud.

How long does moissanite stay brilliant? Permanently, with regular cleaning. The optical properties of silicon carbide do not diminish with age or wear. A moissanite stone cleaned regularly will look as brilliant in twenty years as it does today.

How often should I clean my moissanite ring? For daily-wear rings, a light clean every one to two weeks maintains full brilliance. A five-minute soak in warm soapy water followed by gentle brushing and a thorough rinse is all that is needed.

Will moissanite scratch or dull from everyday activities? At Mohs 9.25, moissanite is extremely scratch-resistant. Normal daily activities typing, cooking, household tasks will not scratch it. Very hard abrasive materials could theoretically scratch the surface, but this requires deliberate effort with specifically harder materials. Everyday environmental contact does not scratch moissanite.

Does moissanite fade in sunlight? No. Moissanite is chemically stable and does not undergo photochemical reactions that would cause fading or color change. Prolonged UV exposure does not affect the stone's color or optical properties.

Is moissanite better than CZ for long-term wear? Significantly better. CZ is porous and progressively loses brilliance as oils penetrate the surface over time. Moissanite is non-porous and maintains its optical properties permanently with cleaning. For any piece worn daily over months and years, moissanite is a far superior choice to CZ.

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