Oval Engagement Rings South Africa

Oval engagement rings are the most requested fancy cut shape we craft at Moissanite by Design. Available in moissanite and lab-grown diamond, the oval cut combines the brilliance of a round stone with an elongated silhouette that makes the finger appear longer and slimmer, which is why it has become the dominant fancy shape choice for South African couples over the past three years.

Every oval stone we set is inspected before it leaves us. We reject stones with a dominant bow tie and only work with ovals cut to proportions that maximise light return. If you want to see your specific stone before we set it, ask us, we will send you a video before anything is crafted.

Why the Oval Cut Works So Well in Moissanite and Lab Diamond

Moissanite has a refractive index of 2.65 to 2.69, which is higher than diamond at 2.42. The oval brilliant facet pattern, 56 to 58 facets arranged in a brilliant layout, is ideally suited to this optical property. The result is intense fire and sparkle that outperforms a mined diamond of equivalent cut quality at a fraction of the price. Lab-grown diamond shares the same optical properties as mined diamond, offering a more subtle white-light sparkle that many buyers prefer.

The oval cut was developed in the 1960s by Lazare Kaplan, a Russian-born diamond cutter who sought to create a shape that delivered round-brilliant brilliance in an elongated form. Since its introduction the oval has grown steadily in popularity, and in recent years it has become the most requested fancy shape for engagement rings globally and in South Africa specifically.
The oval also hides colour well. The 56 to 58 brilliant facets break up light effectively, which means a near-colourless G–I grade oval moissanite appears white in everyday lighting. The same applies to lab-grown diamond in the G–I colour range. This allows you to allocate more of your budget to stone size or setting rather than chasing the highest colour grade.

Understanding the Bow Tie Effect

Every oval cut stone, moissanite or diamond, shows some degree of bow tie. The bow tie is a dark shadow across the centre of the stone caused by light leakage through the pavilion facets when the stone is not cut to precise proportions.

A well-cut oval will have a faint or very subtle bow tie that is only visible under certain harsh lighting conditions. A poorly cut oval will have a dark, dominant bow tie visible from all angles that significantly detracts from the stone’s beauty.

To evaluate bow tie before purchasing, look for a stone where the shadow across the centre is light grey rather than black, and where it disappears or becomes very faint when the stone is rotated slightly. At Moissanite by Design we reject any oval with a dominant bow tie. We also offer video of your specific stone on request so you can assess the bow tie yourself before we set it.

Hearts and arrows oval moissanite is also available. This cut uses tighter facet alignment to create a balanced symmetry pattern that reduces bow tie and produces a cleaner, more controlled sparkle. Hearts and arrows oval moissanite typically costs around twenty percent more than standard oval brilliant and is recommended for buyers who want maximum light performance with minimal bow tie.

Ideal Proportions for Oval Engagement Rings

Not all oval stones are cut equally. To achieve maximum brilliance and fire with minimal bow tie, look for these specific proportions.
Length to width ratio: The ideal range falls between 1.30 and 1.50. A ratio of 1.35 to 1.45 is considered the sweet spot for most buyers. A ratio below 1.25 produces a chubby oval that looks almost round. A ratio above 1.55 produces a very long narrow oval that can look unbalanced on most hands. The ratio is calculated by dividing the length by the width, an oval measuring 10 mm × 7 mm has a ratio of 1.43, which is excellent.

Table percentage: Ideal range is 53 to 63 percent. Pavilion depth: Ideal range is 58 to 62 percent. Girdle: Should be thin to medium. A thick girdle adds weight without adding visible size.

These proportions minimise light leakage and reduce the prominence of the bow tie. At Moissanite by Design we provide actual millimetre measurements for every stone so you can verify the ratio before purchasing.

Choosing the Right Carat Weight

Because the oval cut covers more surface area than a round stone of the same carat weight, you often need less than you think. A one-carat oval measures approximately 8.5 × 6 mm. A one-carat round measures approximately 6.5 mm in diameter. The oval looks meaningfully larger on the finger because its elongated shape covers more surface area.

For finger sizes 4 to 5, a 0.75 to 1 carat oval is well-proportioned and offers good coverage. For finger sizes 5 to 6, one to one and a half carats is the most popular range. For finger sizes 6 to 7, a 1.5 to 2 carat oval makes a bold high-impact choice. For larger hands or buyers who want a showpiece stone, two carats and above are available, we recommend requesting a video at that size to verify the bow tie before committing.

If you choose an oval above two carats, we recommend selecting a colourless D–F grade and requesting a video, as larger ovals can show more colour tint and the bow tie becomes more important to verify.

Colour and Clarity

Oval moissanite and lab-grown diamond are both available in several colour grades. Colourless grades D, E, and F appear completely white with no visible tint. Near-colourless grades G, H, and I show a very faint warmth only visible when compared directly to a colourless stone. Faint colour grades J and K show a slight yellow tint visible to the naked eye in certain lighting.

For ovals set in white gold or platinum, a near-colourless G–I grade is the recommended choice. If you are setting your oval in yellow gold or rose gold, you can consider a J or K colour grade, the warm metal tone masks any warmth in the stone completely.

Clarity refers to the presence of internal inclusions. Most laboratory-grown moissanite and lab-grown diamond is eye-clean. At Moissanite by Design all our oval moissanite is graded VVS or VS clarity. You do not need to pay a premium for IF or FL clarity, even VVS stones are perfectly clean to the unaided eye.

Setting Styles for Oval Engagement Rings

The oval shape works beautifully across a wide range of settings. The most popular at Moissanite by Design are:
Solitaire with four prongs. Four prongs placed at the cardinal points show off the oval shape cleanly and allow maximum light into the stone. Six prongs offer slightly more security but can visually round off the silhouette. We recommend four prongs for oval cuts to preserve the elongated look. Browse our solitaire engagement rings.

Oval halo. A halo of smaller accent stones surrounds the centre stone in an oval outline, adding presence and making a one-carat stone appear significantly larger. The halo is also the most flattering setting for shorter fingers. A double halo or milgrain halo adds a vintage character that pairs well with yellow gold. Browse our halo engagement rings.

Trilogy. A centre oval flanked by two side stones, round, pear, or baguette cut, creates an elegant elongated look. Pear side stones pointing outward from the oval create a particularly graceful silhouette. Browse our trilogy rings.

Hidden halo. The accent stones sit beneath the centre stone rather than surrounding it, creating a subtle halo effect only visible from certain angles. This gives the appearance of a solitaire with added sparkle. Browse our hidden halo engagement rings.

Bezel. A full or partial metal rim wraps around the entire circumference of the oval, offering maximum protection and a clean contemporary finish. Ideal for buyers who work with their hands. Browse our bezel engagement rings.

Pavé band. An oval centre stone on a pavé-set band creates one of the most brilliant combinations available. Browse our pavé engagement rings.

Oval Moissanite vs Oval Lab-Grown Diamond

Both are excellent choices and the decision comes down to optical preference and budget.

Moissanite has a higher refractive index (2.65–2.69 versus diamond’s 2.42) and higher dispersion (0.104 versus diamond’s 0.044). This means moissanite produces more fire, the rainbow flashes of colour, than diamond. Lab-grown diamond has a more subtle white-light sparkle that some buyers prefer. Neither is wrong. It is a matter of personal taste.
In terms of durability, moissanite scores 9.25 on the Mohs hardness scale versus diamond at 10. Both are suitable for daily wear for a lifetime. On price, oval moissanite costs significantly less than a comparable oval lab-grown diamond of similar colour and clarity. For many South African couples, that difference means choosing a larger stone, a more intricate setting, or simply staying within a comfortable budget without compromise on beauty or durability.

If you are still weighing the two options, visit our lab-grown diamond engagement rings page to compare directly.

Frequently Asked Questions About Oval Engagement Rings

Is an oval engagement ring durable enough for daily wear? Yes. Moissanite scores 9.25 on the Mohs hardness scale and lab-grown diamond scores 10, making both harder than every other gemstone. The oval cut has no sharp corners, only curved ends, which makes it resistant to chipping.

Does moissanite lose its sparkle over time? No. Moissanite does not degrade, cloud, or lose its optical properties with age. Soaking in warm water with a few drops of mild dish soap and brushing gently with a soft toothbrush restores full sparkle.

What is the best length to width ratio for an oval? For most buyers, a ratio between 1.38 and 1.48 is the most balanced and flattering. For shorter fingers, a ratio closer to 1.35 to 1.40 is more proportionate. For longer fingers, a ratio of 1.45 to 1.50 creates a striking elongated look.

Can you tell the difference between oval moissanite and oval lab-grown diamond with the naked eye? Most people cannot distinguish the two by appearance alone. The main visible difference is that moissanite produces more rainbow fire than diamond. A trained jeweller can identify moissanite through its double refraction or higher fire under magnification.

Does oval moissanite come in colours other than white? Yes. Moissanite is available in fancy colours including champagne, cognac, green, blue, and grey. Contact us for current availability of fancy colour ovals.

Do you offer certified oval stones? Yes. We provide a certificate of authenticity with every oval moissanite over one carat. GIA and IGI reports are available for lab-grown diamond. Contact us for details.

What is your return policy? All engagement rings are made to order according to your approved specifications. Due to the bespoke nature of each piece, we do not accept returns or offer refunds on custom-made items. We offer a limited lifetime warranty against manufacturing defects. See our returns page for full details.

How long does delivery take within South Africa? Custom engagement rings take four to six weeks depending on complexity. Free shipping is included on all custom engagement rings within South Africa.

Should I insure my oval engagement ring? Yes. Moissanite by Design can provide an appraisal document for any ring we sell. We recommend insuring your ring just as you would any valuable piece of jewellery.

Why Buy Your Oval Engagement Ring From Moissanite by Design

Moissanite by Design has been a trusted retailer of moissanite and lab-grown diamond engagement rings in South Africa since 2019. We carry only the highest grade stones, inspect every oval before setting, and reject any stone with a dominant bow tie. Every ring is made to order in your size. You approve a 3D render before we craft anything. Free resizing is included with each engagement ring.

Our customer service team is available six days a week. If you do not see exactly what you are looking for, request a custom quote and we will design your oval engagement ring from scratch to your exact specifications.

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Explore other shapes: Round · Pear · Cushion · Emerald · Princess · Marquise