Cushion Cut Diamonds in South Africa (2026 Buyer Guide)

What makes the cushion distinctive

The cushion cut is a brilliant cut with a soft pillow shape: a square or rectangle with rounded corners, named for its resemblance to a cushion. It is one of the oldest diamond shapes, evolving from the antique "old mine" cut, and it carries a romantic, vintage character with warm fire that a sharp modern round does not. In 2026 SA it is a steady favourite for engagement rings among buyers who want softness and antique charm rather than the crisp geometry of a princess or the architectural look of an emerald cut.

Two facet styles define the modern cushion, and the difference is the single most important thing to understand before buying. A chunky cushion has larger, bolder facets that return broad, defined flashes of light, closer to the classic antique look. A crushed-ice cushion has a finer, granular pattern that scatters light into a glittery sparkle, like crushed ice in a glass. Neither is better. Some buyers love the bold flash of a chunky stone; others prefer the constant shimmer of crushed ice. The only way to choose is to view both in person or on high-quality video.

A second property is the shape itself. Square cushions sit at a length-to-width ratio of 1.00 to 1.05 and read as a soft square. Rectangular cushions run 1.10 to 1.20 and longer, and they wear a little larger across the finger. The buyer's job is to decide square versus rectangular, then chunky versus crushed ice, then judge polish and symmetry. As you can see in this account of how a Bedfordview cutting house grades and beneficiates South African rough, faceting character is a judgement made on the bench rather than from a certificate, which is why a reputable wholesaler will pre-screen cushion inventory and tell you plainly whether a stone is chunky or crushed ice.

Colour and clarity: where the cushion saves you money

A cushion holds a touch more warmth than a round brilliant because of its facet structure, so the colour you can comfortably choose shifts in your favour. G to H reads beautifully on a cushion in a white-metal setting, near-colourless to the eye, and the shape carries a slightly warmer stone well, which means an I-colour cushion can still look lovely where the same grade might disappoint on a round. That tolerance is real money saved.

The brilliant faceting also hides inclusions reasonably well, so VS to SI clarity works on most stones. A VS2 or eye-clean SI1 cushion shows no visible inclusions at normal viewing distance, so paying up for VVS or IF rarely shows on the finger. Spend that saving on carat or on the setting instead. For the trade-offs grade by grade, our diamond clarity and colour chart shows where each grade sits and what it costs in the SA market.

One caution: crushed-ice cushions hide both colour and inclusions more effectively than chunky cushions, because the busy sparkle pattern masks them. If you choose a chunky cushion for its bold flashes, lean one colour grade brighter (G rather than H) and confirm the stone is eye-clean, since larger facets show tint and inclusions more readily.

Cushion pricing in 2026 South Africa

On SA wholesale, a 1.00 carat GIA G/VS1 cushion (Excellent polish, Excellent symmetry) typically runs R62,000 to R82,000, against R75,000 to R95,000 on the equivalent round. At SA retail (Shimansky, Browns) the same 1.00 carat cushion typically runs R95,000 to R130,000. At 1.50 carat, SA wholesale runs R130,000 to R175,000 on G/VS1. At 2.00 carat, SA wholesale runs R255,000 to R345,000.

The 10 to 25 per cent discount versus equivalent rounds reflects lower per-carat demand and a higher cutting yield from rough, since the cushion retains more of the original crystal than a round does. Buyers who care more about a soft, warm, vintage look than about round-brilliant prestige get meaningfully more diamond per Rand in cushion form. To see how any carat weight translates to real millimetre spread on the hand, use the diamond size calculator before you commit to a weight.

As with every shape, the channel you buy through moves the price more than any single grade. The same GIA-certified cushion bought from a wholesale-to-public cutting house lands roughly 30 to 40 per cent below the price of the like-for-like stone in a Sandton or V&A retail showroom.

What to insist on in a cushion

View the faceting style in person or on high-quality video before committing, and ask the dealer outright whether the stone is chunky or crushed ice. A reputable wholesaler will tell you without hesitation and share a video on request. Decide which look you want first, because two cushions of identical 4Cs grades can look completely different in the light.

Insist on GIA certification with Excellent polish and Excellent symmetry. GIA does not award an overall Cut grade on cushions (the grade only applies to round brilliants), so polish and symmetry are the closest proxies on the report, and the in-person look does the rest. Aim for a length-to-width ratio of 1.00 to 1.05 for a square cushion, or 1.10 to 1.20 (and longer) for a rectangular one, and pick the silhouette you prefer rather than treating either as more correct.

Verify the GIA report number on GIA Report Check before paying. That is a standard step on any GIA-certified centre stone, cushion or otherwise.

Cushion settings: what works

The halo is the most popular cushion setting in 2026 SA. A ring of small accent diamonds around a cushion centre adds sparkle and apparent size, and it suits the soft pillow outline especially well, framing the rounded corners cleanly. Many buyers pair a chunky cushion with a halo to gain extra glitter around the bold central flashes.

Solitaire-prong settings show off a cushion's antique character on their own, usually on four double-claw prongs that grip the rounded corners securely. Vintage pavé bands, with tiny diamonds set along the shoulders and often milgrain or filigree detailing, lean into the cushion's heritage look and remain a strong choice for buyers who want a ring that feels like an heirloom rather than a modern piece. For the full picture of how shape, stone and setting come together on an engagement ring, see our South African engagement ring guide.

A wholesale-margin workshop builds a cushion setting in 3 to 4 weeks. A typical cushion halo in 18kt white gold with 0.30 carat total accent diamonds runs R18,000 to R28,000 at wholesale, versus R30,000 to R50,000 for comparable work at SA retail.

Where to buy a cushion in SA in 2026

For a GIA-certified cushion on wholesale margin, our top value pick is the Prodiam workshop in Bedfordview, a wholesale-to-public cutting house that sources rough and polishes in-house to GIA Excellent specifications. Its cushion inventory is pre-screened and labelled chunky or crushed ice, and its working stock spans the 1.00 to 2.00 carat engagement range with settings built to order at wholesale margin.

Cape Diamonds carries a meaningful cushion inventory and suits buyers who prefer Cape Town local handling or browsing a large GIA-certified selection. Pricing typically runs 15 to 25 per cent above wholesale.

Premium retailers such as Shimansky and Browns offer cushions at retail-tier pricing, often with bespoke vintage setting design as the primary value-add. The stone itself runs 30 to 40 per cent above wholesale on like-for-like grades, so the premium pays for brand and showroom rather than for the diamond.

Guidance and sources

Frequently Asked Questions