August 31, 2026

Antique Cushion vs Modern Cushion: Why They Look Nothing Alike

By Sasha Tarasova

Filed under Antique Diamonds & Diamond CutsAntique & Vintage Engagement Rings

"Cushion cut" is one of the least useful phrases in diamond buying, because it describes an outline rather than a stone. Two diamonds can both be honestly called cushion cut and have almost nothing in common — different proportions, different light behaviour, different eras, and prices that are not remotely comparable.

Knowing which one you are looking at is worth real money.

The antique cushion

What the trade calls an antique cushion is essentially the old mine cut: the dominant diamond cut from roughly the 1700s until the early twentieth century.

Its proportions come from one governing priority — keep as much of the rough as possible. Diamonds were scarce, cutting was done by hand, and losing weight to achieve symmetry was not a trade anyone wanted to make.

That produces a consistent set of features:

• A high crown. The section above the girdle is tall, which throws broad coloured flashes rather than fine white sparkle.
• A small table. The flat facet on top is narrow relative to the stone — often under 50% of its width, where a modern stone runs closer to 60%.
• A deep pavilion. The stone carries weight below the girdle, which is why an antique cushion often looks smaller face-up than its carat weight suggests.
• An open culet. The bottom point is flattened into a small facet. Look straight down through the table and you see it as a distinct dot — often mistaken by newcomers for a chip or an inclusion. It is neither. It is a dating feature.
• A squarish, softly rounded outline that is rarely perfectly symmetrical.

The result is a stone that behaves like a slow fire. Big, warm, distinct flashes that move as you move, rather than a continuous white glitter.

The modern cushion

The modern cushion appeared in its current form in the late twentieth century and is engineered for a different goal: maximum brightness under electric light.

• A lower crown and a much larger table
• A shallower pavilion, spreading the weight outward so the stone looks bigger face-up
• No culet — the pavilion comes to a true point
• Machine-precise symmetry with evenly matched facets

Within modern cushions there are two families worth distinguishing. The cushion brilliant has larger, blockier facets and produces distinct chunky flashes. The cushion modified brilliant adds an extra row of facets on the pavilion, producing the fine, granular scintillation the trade calls crushed ice. They look genuinely different, and neither seller nor certificate always makes this obvious. Ask which you are being shown.

Telling them apart in thirty seconds

You do not need equipment.

1. Look straight down through the top. A visible dot at the very centre is an open culet, which means antique.
2. Look at the stone from the side. A tall, domed profile above the girdle is antique. A flat, wide profile is modern.
3. Judge the table. If the flat top facet looks small relative to the whole stone, you are in antique territory.
4. Move it under light. Few large, slow, coloured flashes suggest antique. Fine, fast, white glitter suggests modern.
5. Check symmetry. Slight irregularity is a mark of hand cutting. Perfect matching is a mark of machinery.

Why the price differs

Antique cushions generally command a premium over modern cushions of comparable carat weight and colour, for reasons that are structural rather than fashionable.

Supply is fixed. No one is producing new old mine cuts — the entire stock is what survived, and every stone that gets recut into a modern shape permanently reduces it. Meanwhile demand has risen sharply as buyers have moved away from uniform modern brilliance.

There is also a provenance argument. An antique cushion was mined and cut before modern industrial diamond mining existed, which for some buyers resolves questions that a new stone does not. Our comparison of natural and lab grown diamonds covers where antique stones sit in that conversation.

Work against this: an antique cushion of a given carat weight looks smaller face-up than a modern one, because more of its weight is hidden below the girdle. You are paying more for a stone that measures less across the top. Whether that is worth it depends on whether you want size or character — a question worth answering honestly before you shop, not in front of a display case.

The recutting question

You will occasionally be offered an antique stone with a suggestion that it could be "improved" by recutting to modern proportions.

Understand what that means. Recutting is irreversible, destroys carat weight, and converts a finite antique stone into a modern one that competes with an effectively unlimited supply. In most cases it reduces value rather than increasing it.

There are narrow exceptions — a stone with damage severe enough to threaten its integrity may genuinely need work. But "it will sparkle more" is not a reason. It is a description of what you would be giving up.

Which to buy

Buy a modern cushion if you want maximum face-up size for your budget, precise symmetry, and lively white brilliance under everyday lighting.

Buy an antique cushion if you want a stone with visible individuality, warmth in low light, a fixed and shrinking supply, and the specific look that antique settings were designed around.

The mistake is not choosing wrongly. The mistake is paying antique prices for a modern stone because the word on the tag was the same. If you are hunting a specific antique cushion, tell us what you are looking for.