Types of Cushion Cut Diamonds Guide

"Cushion cut" isn't one cut — it's a family of related square-to-rectangular, rounded-corner shapes that differ in facet pattern, crown geometry, and outline: cushion brilliant, cushion modified brilliant, antique cushion, elongated cushion, and mini cushion melee. Guru Diam stocks 382 cushion cut lab-grown diamonds across the family, CVD-grown, IGI-certified as standard with GIA available on request, from our New York Diamond District desk.

Buyers searching "cushion cut diamond" usually already know the pillow-shaped outline. What most sourcing pages skip is that a request for "a cushion" can mean five genuinely different stones depending on facet pattern, crown height, length-to-width ratio, and size — and specifying the wrong one is the most common cause of a client rejecting a stone they technically asked for. This guide is the taxonomy: it maps the whole cushion family in one place, tells you which variant fits which order, and routes you to a full dedicated sourcing guide for each type when you need the deeper spec table, pricing, and inventory detail.

What "cushion cut" actually covers

At its broadest, cushion cut means a square-to-rectangular outline with rounded, "pillow" corners — that's the one thing every cushion has in common. Everything else varies. Facet pattern ranges from a standard brilliant arrangement, to a modified brilliant with extra facet rows, to genuine antique faceting with a high crown and an open culet. Outline ranges from a near-square 1:1 ratio to a visibly elongated rectangle above 1.15:1. Size ranges from center-stone carat weight down to calibrated melee under a millimeter. Those variables combine into five distinct types buyers actually ask for by name, and they don't perform the same way under light, don't cut from rough at the same yield, and don't wear the same way in a setting.

The corner rounding itself is also not fixed — some cushions have a tighter, almost-square corner radius, others round off closer to an oval silhouette. That's a style variable within each of the five types below rather than a type on its own, but it's worth flagging to a buyer who's comparing stones side by side: two cushion brilliants at the same L:W ratio can still look meaningfully different face-up because of corner treatment alone.

It's also worth separating "cushion cut" from cut grade. GIA and IGI don't publish a formal cut-grade scale for cushion the way they do for round brilliant — there's no universal "Excellent" or "Ideal" cushion the way there is for round. Proportions, faceting style, and symmetry are graded and reported, but the type itself (brilliant vs. modified vs. antique) is a style choice, not a quality tier. A well-cut modified brilliant and a well-cut standard brilliant are both "good" cuts — they're just different products aimed at different light-performance preferences.

How to inspect cushion cut quality before you buy

Because there's no single cut-grade scale to lean on, buyers evaluating a cushion cut diamond — lab-grown or natural — are checking a handful of proportion and symmetry factors directly, on top of the standard color/clarity/carat grading on the certificate.

• Bow-tie effect. A dark, bow-tie-shaped shadow across the center of the stone, most visible on elongated cushions and some modified brilliants. A faint bow-tie is normal and even expected on elongated shapes; a heavy, high-contrast bow-tie that dominates the face-up view is a cutting-quality issue worth rejecting a stone over.
• Windowing. A washed-out, see-through patch near the center of the stone where light is passing straight through instead of reflecting back — usually a sign the pavilion angle is too shallow for the crown. More common on stones cut for maximum carat retention over light performance.
• Symmetry and outline consistency. Cushions are hand-checked for even corner rounding and a symmetric outline — an off-center culet or uneven "pillow" shape reads immediately to a trained eye, especially in a solitaire setting with no side stones to distract from it.
• Girdle thickness. Consistent, medium girdle thickness protects against chipping at the corners — the most vulnerable point on any cushion shape — without adding invisible weight the client is paying carat price for.
• Crown height and culet size (antique cushion specifically). These are the two proportions that most directly separate a genuine antique-style cushion from a modern cushion in a vintage-inspired setting — confirm both against spec rather than relying on the word "antique" in a listing description.

None of this replaces certification — it's the layer of buyer judgment that sits on top of a cert, useful when a client is choosing between two similarly graded stones or when a photo alone isn't enough to confirm light performance.

The five cushion types

Every cushion cut stone we handle falls into one of five buckets. The first four are for center-stone and accent-stone weights (roughly 0.30ct and up); the fifth covers the calibrated small goods used in pavé, halos, and channel work.

• Cushion brilliant. The standard modern cushion — a brilliant-style facet arrangement (typically around 58 facets) on the classic square-to-slightly-rectangular pillow outline. Broad, open facets produce large, bright flashes rather than tight scintillation. This is the everyday, highest-volume cushion in most inventories, including ours. Full detail: our cushion brilliant vs. cushion modified brilliant comparison.
• Cushion modified brilliant. The same pillow outline, but with extra facet rows added to the crown and pavilion — often called a "chunky brilliant" or "crushed ice" cushion in the trade. More facets means smaller, more numerous flashes: a sparklier, more broken-up light pattern than a standard cushion brilliant, at some cost to the size of individual flashes. See the full facet-by-facet breakdown in our cushion brilliant vs. modified brilliant guide.
• Antique cushion. A cushion cut with genuine antique faceting character — higher crown, larger open culet, fewer and larger hand-finished-style facets — producing a warmer, softer light pattern than either modern brilliant variant. The term gets used loosely in retail marketing to mean almost any cushion in a vintage-style setting, which causes real confusion with the historical Old Mine Cut. We untangle that specifically in Antique Cushion vs. Old Mine Cut.
• Elongated cushion. A cushion with a visibly rectangular outline — typically 1.15–1.50 length-to-width — rather than the square-to-1.05 ratio of a classic cushion. The elongation makes the stone read larger face-up per carat and creates a slimmer, finger-lengthening silhouette. Full detail in our elongated cushion cut guide.
• Mini cushion / cushion melee. Calibrated cushion-shaped stones below center-stone weight, used for halos, three-stone side settings, pavé shoulders, and eternity-style channel work. These are cut to tight size tolerances so a run of stones sits flush in a die-struck or hand-fabricated setting without gaps — consistency of outline and depth matters more here than the facet-pattern nuance that drives center-stone buying decisions. Mini cushions ship as calibrated goods against a color/clarity baseline rather than as individually certified stones, the same convention used across our broader melee program.

Choosing the right type for an order

The practical rule: if a client says "cushion" without qualifiers, they almost always mean cushion brilliant — it's the default in the category and the deepest stock across most inventories. Antique cushion, elongated cushion, and modified brilliant are all deliberate, specific requests, and worth confirming explicitly before you quote or cut, since the four center-stone types are not interchangeable in a finished setting. Mini cushion melee is a separate conversation entirely — it's ordered by quantity and calibration spec, not by the same facet-pattern criteria buyers use for a center stone.

How Guru Diam sources across the cushion family

The five cushion types don't come off one production line, and we don't inventory them the same way. Cushion brilliant and cushion modified brilliant are volume categories — both cut in-house from CVD rough to a standard specification, held in depth across a wide size and quality range because they cover the bulk of engagement-ring center-stone demand. Antique cushion runs through a slower, more deliberate cutting pass: the high crown and open culet that define the look are a labor-intensive departure from a standard brilliant cut, so this category is stocked thinner and priced to reflect that.

Elongated cushion sits in between — it's cut in-house to the same brilliant or modified-brilliant faceting as the square version, just planned from rough with a different length-to-width target, so depth of stock tracks buyer demand for the elongated silhouette rather than a separate cutting discipline. Mini cushion melee is calibrated and QC'd against a color and clarity baseline the same way the rest of our melee program is — a run is checked for consistent outline, depth, and face-up size before it ships, rather than certified stone-by-stone.

Across all five, the underlying material is the same: CVD-grown rough, cut in-house, graded to standard grading criteria. What changes between types is cutting approach, yield, and how deep we hold stock — not the growing method or the quality standard the finished stone is held to.

Buyer guidance: matching the variant to the use case

Beyond the spec table, the type decision usually comes down to what the stone is going into and what the client already owns or has referenced.

• Engagement ring center stone, no reference photo: default to cushion brilliant. It's the deepest-stocked type, the most familiar silhouette to a walk-in buyer, and the safest default when a client says "cushion" without more detail.
• Client wants "more sparkle" or references crushed-ice / chunky-brilliant styling: cushion modified brilliant. This is the most common upgrade request off a cushion brilliant baseline — same outline, denser light pattern.
• Client is referencing an heirloom, an estate piece, or a period-style setting: antique cushion. Confirm whether they mean the softer antique facet pattern or are actually describing an Old Mine Cut — the two get conflated constantly in retail marketing, and the setting style (bezel, milgrain, filigree-adjacent) is often the tell.
• Client wants a stone that reads larger for the carat weight, or a slimmer finger-lengthening profile: elongated cushion. This is also the type to reach for when a client has been comparing radiant or emerald cuts but wants softer, rounded corners instead of a step-cut outline.
• Halo, three-stone side settings, pavé shoulders, or channel work: mini cushion melee, ordered by size and quantity rather than by facet-pattern preference.

When in doubt, ask for the L:W ratio and the setting style before quoting — those two data points resolve most of the ambiguity between the four center-stone types faster than a facet-pattern description over the phone.

Pricing factors across the cushion family

Cushion is a Regular Fancy shape in our tiering — mid-market pricing, not commodity round and not premium antique — but the five types inside that category don't price identically, and the spread matters when you're quoting against a budget.

• Cutting complexity. Cushion brilliant is the baseline. Modified brilliant carries a modest premium for the extra facet rows. Antique cushion carries the largest premium of the four center-stone types — the higher crown and open culet mean lower yield from the same rough and a slower cutting pass.
• Length-to-width ratio. Elongated cushions at the higher end of the 1.15–1.50 range can command a premium when the ratio is precise and consistent, since planning rough to hit a specific elongation target reduces usable yield compared to a square cut.
• Carat weight and the four Cs. Standard diamond pricing mechanics apply within each type — color, clarity, and carat weight move price the same way they would on a round brilliant, just against a different base.
• Certification tier. IGI-certified is our standard and typically the most cost-efficient option; GIA on request carries the certification's own premium independent of the stone. Melee is priced as calibrated parcel goods against a color/clarity baseline rather than per-stone certification cost.
• Matched sets. Side-stone pairs or trios cut to match a center stone's color and clarity — common with elongated and antique cushion three-stone builds — carry a matching premium over sourcing the same stones individually.
• Melee parcel size. Mini cushion melee prices per carat of the parcel, driven by calibration tightness and quantity rather than individual stone selection — a tightly calibrated small parcel for a single halo costs proportionally more per carat than a bulk order sized for a production run.

For exact current pricing by carat weight and quality grade on our core cushion brilliant and modified brilliant inventory, see the full spec table in our cushion cut wholesale sourcing guide.

One more variable worth flagging for anyone quoting against a natural-diamond benchmark: lab-grown CVD cushions across all five types price meaningfully below natural-origin equivalents at the same color, clarity, and cut, which is the main reason cushion — already a mid-market shape rather than a premium antique cut — has become one of the more frequently reordered categories among jewelers switching part of their bench work to lab-grown. That gap holds across the family; it's not concentrated in one type over another.

Certification and quality standards

All four center-stone cushion types — brilliant, modified brilliant, antique, and elongated — are IGI-certified as standard, with GIA certification available on request. GCAL certification is also available for buyers who specifically need it. Certification covers the standard 4Cs plus cut-specific notes relevant to the type: light performance for the brilliant variants, faceting character for antique cushion, proportions for elongated stones.

Mini cushion melee follows a different quality convention, consistent with our broader melee program: pieces below individual-certification carat weight ship as calibrated parcel goods against a DEF+/VS+ quality baseline rather than stone-by-stone certification. That's an industry-standard approach for small calibrated goods, not a quality shortcut — the baseline is checked before the parcel ships, it's just not documented per-stone the way a 0.50ct+ center stone is.

How to order cushion cut diamonds wholesale

Ordering across the cushion family works the same way regardless of which type you need:

• Open a verified wholesale account. Trade accounts get access to live inventory, pricing, and the ability to place holds on specific stones — open one at /signup.
• Specify the type, not just "cushion." Give the L:W ratio, facet-pattern preference (standard brilliant vs. modified/crushed-ice vs. antique), and size — that's usually enough to route the request to the right stock without back-and-forth.
• Book a gemologist for anything ambiguous. Antique-vs-vintage-styling questions, matched-set builds, and elongated ratio targets are easier to resolve on a call than over a written spec — book time at /book-appointment.
• Melee orders go by calibration spec. Size range, shape, quantity, and quality baseline — not individual stone selection.
• Loose stones ship from on-hand inventory. Center-stone and accent-weight cushions across all four non-melee types are ready-to-ship from current stock, not made to order.

Sourcing cushion cut diamonds wholesale

Guru Diam carries 382 cushion cut lab-grown diamonds on hand across the full family — cushion brilliant, cushion modified brilliant, antique cushion, and elongated cushion, plus calibrated mini cushion melee — CVD-grown, IGI-certified as standard, GIA available on request, from our New York Diamond District desk (36 West 47th Street, Suite 601A) and our Los Angeles office (607 South Hill Street, Suite 241). For the full spec table, size range, and pricing on our core cushion inventory, see our cushion cut wholesale sourcing guide. For fancy color cushions specifically, see our fancy color cushion guide — available in yellow, pink, blue, and green.

Ready to buy? Open a verified wholesale account at /signup and book time with a gemologist at /book-appointment.

FAQ

What are the different types of cushion cut diamonds? Five main types: cushion brilliant (standard modern faceting), cushion modified brilliant (extra facet rows for denser sparkle), antique cushion (high-crown, open-culet historical faceting), elongated cushion (rectangular outline rather than square), and mini cushion melee (small calibrated stones for halos and pavé). They share the rounded "pillow" outline but differ in facet pattern, light behavior, length-to-width ratio, and size.

What's the difference between a cushion cut and a cushion brilliant? "Cushion cut" is the umbrella term for the whole pillow-shaped family. "Cushion brilliant" is the specific, most common type within that family — a standard brilliant facet arrangement on the classic square-to-slightly-rectangular cushion outline.

Is antique cushion the same as Old Mine Cut? Not exactly — they overlap but aren't identical terms. See our full Antique Cushion vs. Old Mine Cut breakdown for the disambiguation; in short, "antique cushion" is used more loosely in modern marketing, while Old Mine Cut refers to a specific historical faceting standard.

Which cushion type is most popular for engagement rings? Cushion brilliant is the default and highest-volume choice for engagement ring center stones. Cushion modified brilliant is the most common upgrade request when a client wants more visible sparkle; elongated cushion is the most common request when a client wants a slimmer, larger-looking silhouette.

What is mini cushion melee used for, and how is it different from a center-stone cushion? Mini cushion melee is a calibrated small-goods category — cushion-shaped stones cut to tight size tolerances for halos, three-stone side settings, pavé shoulders, and channel work. Unlike the four center-stone types, melee is ordered by calibration spec and quantity rather than selected stone-by-stone, and it ships as parcel goods against a quality baseline rather than individually certified.

Are all cushion cut types available lab-grown and certified? Yes, for the four center-stone types. Guru Diam's full center-stone cushion inventory — brilliant, modified brilliant, antique, and elongated — is CVD-grown and IGI-certified as standard, with GIA and GCAL certification available on request. Mini cushion melee is CVD-grown and quality-checked against a calibrated baseline rather than individually certified, consistent with standard melee practice across the trade.