Moissanita vs Diamante Differences in Price, Sparkle and Quality

Two rings can appear almost identical on a jewellery display, but the centre stones could be vastly different. That is often the comparison between moissanita vs diamante, particularly when it comes to engagement rings in Spain.

Moissanite is popular for its colourful sparkle and affordable price. Diamond has a subtly different appearance, superior hardness and a long-standing reputation. There is a third choice, however, in the form of laboratory-grown diamonds, which offer the properties of a natural diamond without coming from underground.

The differences become clear when the illusion is dispelled and you consider the appearance and wear as well as fitting within your budget.

Moissanita vs Diamante: The Difference Inside the Stone

Moissanite and diamond are both completely separate gemstones despite the similar appearance.

Diamond is made up of carbon in a specific crystal formation. Moissanite is silicon carbide, a mineral made up of silicon and carbon. They are both found naturally, though practically all moissanite available in modern jewellery is man-made.

As their composition differs, so too do the optical properties, hardness and weight.

A colourless moissanite may look very similar to a diamond, particularly when it is a smaller size, but those similarities become less exact when viewed in larger sizes, particularly with different lighting.

It is best to consider moissanite as a gemstone in its own right, and not a cheaper alternative to diamond.

Why Moissanite Has More Colourful Flashes

Flash is part of the optical phenomenon created by a gemstone. It is a combination of refractive index and dispersion, which is how the light is bent and split into the spectrum of colours.

Diamond has a refractive index of approximately 2.42, whereas moissanite has a refractive index that ranges from 2.65 to 2.69. Moissanite also has greater dispersion, so it splits the light into more of the spectrum of colours.

When you see a moissanite ring in bright light, it is likely to produce more noticeable flashes of rainbow colour. Diamond has less dispersion, so it usually has a better balance of white brilliance and flashes of colour.

The difference might not be immediately visible to the naked eye. The strength and presence of any flash will often depend on the lighting, which can be manipulated by a photographer to make either gemstone appear more desirable than it is in real life.

It also depends on the cut of the stone. Round brilliant cuts are designed to create flashes of light, whereas emerald cuts have larger facets that create a subtler optical effect.

If you are shopping for an engagement ring, seeing the ring under daylight and regular indoor lighting is probably more useful than looking at a heavily lit display counter.

The Place of Lab Grown Diamonds in the Comparison

The name lab grown diamonds can sometimes be confusing, particularly if you are trying to compare moissanite vs diamante, since moissanite is also man-made.

Their similarity pretty much stops at being produced in a laboratory.

A lab grown diamond is actually a diamond. Its chemical composition and hardness are the same as a naturally occurring diamond, just produced in a controlled environment using different methods such as Chemical Vapour Deposition (CVD) or High Pressure High Temperature (HPHT).

Moissanite is always silicon carbide, no matter what method is used.

This means that Spanish jewellery buyers have another option. If you want an actual diamond but find the asking price of an equivalent naturally-grown diamond unappealing, you can consider a laboratory-grown diamond.

Novita Diamonds is one specialist to consider when it comes to laboratory-grown diamond engagement rings and comparing diamond characteristics to find the ideal setting.

The important thing to remember is that a lab grown diamond is not moissanite, and moissanite should never be advertised as a diamond.

Moissanita vs Diamante: Hardness Counts, But What About Your Setting?

On the Mohs hardness scale, diamond scores a 10, whereas moissanite scores at 9.25 on average.

This means that both are extremely scratch-resistant and ideal for jewellery that is worn on a day-to-day basis, such as an engagement ring.

With that being said, the Mohs scale only measures a stone’s resistance to scratching. Both diamond and moissanite can crack under a strong enough impact from the wrong angle. A diamond might crack more easily than moissanite, simply because it is harder and more resistant to scratches.

The setting is just as important as the gemstone, so you need to give equal consideration to the design and construction.

An exposed solitaire with fine prongs may need a more careful handling than a setting with a protective bezel. You also need to consider stones that have sharp edges, such as princess-cut and pear-shaped stones.

When it comes to everyday wear, you should examine the prongs and overall thickness of the ring band. You should always take the quality of the metalwork into consideration as well.

Cleaning is a factor as well, since oils, soap residue and cosmetics can build up on either gemstone, reducing the sparkle until they have been cleaned.

The Difference in Price Goes Beyond the Carat Weight

Moissanite is usually cheaper than a laboratory-grown diamond, whereas natural diamonds are usually more expensive than both.

There is no universal percentage that can be applied to every size, cut or quality.

Another factor that prevents a simple calculation is the fact that moissanite and diamond are not the same density.

A moissanite and a diamond 6.5 millimetres across will look similar in size, but they will have different carat weights. Moissanite sometimes uses diamond carat sizes to indicate the visual size difference.

It is better to compare millimetre measurements rather than carat sizes for a direct comparison.

For the Spanish buyer, it is also important to consider the cost of the ring. It will depend on the metal, manufacturing work, setting design and any applicable IVA.

A simple solitaire in 18-carat gold will have a different price than a ring with a pavé band and accent stones.

Looking at the laboratory-grown diamond selections from Novita Diamonds can be another useful way of finding how the centre stone fits into the overall price.

How to Choose a Stone Based on the Ring Design

Choosing between moissanite and diamond can influence the whole ring design.

A large round moissanite might be appealing to someone who likes the flash of colour. Its optical qualities are best showcased in direct lighting.

A diamond can be preferable for someone who likes the traditional diamond look, with a better blend of white brilliance and flashes of colour.

The colour of the metal can change things as well.

Yellow gold will give a warmer look around a colourless stone, whereas white gold and platinum will give a cooler appearance. Rose gold adds a touch of pink to the overall look.

Oval, cushion and pear-shaped stones should always be considered because their proportions affect the light performance. Two stones with the same outline can look quite different.

Rather than picking a stone based on a picture that looks impressive in close-up, consider how it will look with the intended ring design. Examine how the stone appears at a regular viewing distance.

Comparing Gemstone Reports When Buying in Spain

Independent gemological documentation can give a shopper a good idea about the characteristics of a diamond.

The International Gemological Institute (IGI) is well known for its laboratory-grown diamond reports, which include the measurements and the four C’s (cut, colour, clarity and carat weight). The Gemological Institute of America (GIA) has announced an updated assessment system for colourless to near-colourless laboratory-grown diamonds, which will begin to appear in October 2025. Rather than using its traditional diamond grading terminology for grading these stones, GIA has introduced new terms, Premium and Standard.

These differences are important if you are comparing reports from different laboratories.

Moissanite does not receive a diamond grading report because it is not a diamond. Any documentation that comes with moissanite should clearly identify the gemstone and highlight the characteristics that are being described.

If you are doing research into diamond jewellery through Novita Diamonds, you should check these independent grading documents as you compare different individual gemstones.

A grading report should always be distinguished from a valuation. It will document the characteristics of a gemstone, but it will not assign a resale value to the ring.

What to Check Before You Pay for an Engagement Ring

It becomes much easier to make a decision on the ring if you compare the finished ring rather than the gemstone. Ask for the millimetre measurements of the stone, check if the stone is natural or laboratory-grown and examine the cut of the gemstone. If there is an independent grading report, verify the number with the issuing laboratory. You should always consider the construction of the ring. The prongs should keep the gemstone secure, and the band should not be unnecessarily delicate.

Spanish buyers should always take a closer look at the stated fineness of the metal, total cost (IVA included), resizing availability, warranty conditions and return policy when it comes to personalisation or made-to-order rings. The return conditions may differ from a standard selection.

The most useful comparison is between rings of similar sizes and construction, seen under similar lighting.

A larger moissanite may provide the appearance and more colourful flashes that someone wants within a certain budget. A laboratory-grown diamond may be more appropriate if diamond identity matters, but the cost of a comparable naturally grown diamond is unappealing.

Whichever material you pick, the cut, proportions, setting and clarity of the information provided by the seller should be examined before you buy the ring.