Book Appointment
A cushion cut diamond is a square-to-rectangular outline with rounded "pillow" corners, cut as a brilliant, modified brilliant, antique, or elongated variant. Guru Diam stocks 382 cushion cut lab-grown diamonds on hand, CVD-grown, IGI-certified as standard with GIA available on request, from our New York Diamond District desk — the deepest cushion inventory in our full catalog.
Cushion is one of the most consistently requested shapes in the trade, and it's also one of the most misquoted, because "cushion" alone doesn't specify which of four real variants a client means. This is the main sourcing page for the full category — spec table, availability, and certification — with links out to a dedicated guide for each cushion type when you need shape-family depth.
What is a cushion cut diamond?
A cushion cut is defined by its outline, not a single facet pattern: a square-to-rectangular shape with rounded corners, resembling a pillow. Within that outline, cushions split into four real types — cushion brilliant (standard modern faceting), cushion modified brilliant (extra facet rows for denser sparkle), antique cushion (high-crown, open-culet historical faceting), and elongated cushion (rectangular rather than square proportions). See our full breakdown of cushion cut types for how to tell them apart and which to spec for a given client. Guru Diam's cushion inventory is CVD-grown and IGI-certified as standard, with GIA certification available on request for any stone in stock.
Why cushion holds a deep spot in wholesale inventory
Cushion's rounded corners make it more chip-resistant in everyday wear than a pointed shape like a marquise or pear, which keeps it in steady demand for engagement rings that see daily use. Its mixed facet character — a brilliant crown paired with a broader pavilion in most variants — gives it a distinct look from a round brilliant without sacrificing much fire, which is also why cushion is the highest-volume shape in our fancy color category (see our fancy color cushion guide). Between classic bridal demand and fancy color demand pulling from the same shape, cushion earns a deep, actively replenished stock position rather than a spot-order category.
Cushion cut spec and availability
| Spec | Detail |
|---|---|
| Outline | Square-to-rectangular, rounded "pillow" corners |
| Facet styles available | Brilliant, modified brilliant, antique, elongated |
| Typical L:W ratio range | 1.00 (square) to 1.50+ (elongated) |
| Growth method | CVD-grown |
| Certification | IGI standard; GIA available on request |
| Stone type | Certified single stones; matched pairs available on request |
| On-hand count | 382 pieces |
| Typical uses | Engagement ring center stones, halo settings, studs, custom pieces |
Sourcing cushion cut diamonds wholesale
Realistically, cushion is easy to find as a generic listing and hard to find with real depth across all four variants in one place — most wholesalers stock the standard brilliant heavily and treat antique, modified, and elongated cushions as afterthought SKUs, if they carry them at all. Guru Diam runs 382 pieces deep across the full cushion family, so a request for a specific variant — antique faceting, elongated proportions, extra sparkle — is a normal order against current stock, not a special-order gamble. Matched pairs for studs or side stones are a standard request across the category; see our matched pairs sourcing guide for how pair-matching works.
Guru Diam sources cushion cut diamonds as wholesale, trade-only inventory — no retail markup — from our New York Diamond District desk (36 West 47th Street, Suite 601A) and our Los Angeles office (607 South Hill Street). In-stock pieces ship same-day from New York. For a custom setting, CAD-to-finished-piece turnaround runs 4–6 days.
Ready to buy? Open a verified wholesale account at /signup and book time with a gemologist at /book-appointment.
FAQ
What is a cushion cut diamond? A cushion cut diamond is a square-to-rectangular shape with rounded "pillow" corners. Within that outline, it can be cut as a standard brilliant, a modified brilliant (extra facets for denser sparkle), an antique-faceted stone, or an elongated (rectangular) variant.
How many cushion cut lab-grown diamonds does Guru Diam have in stock? 382 pieces, across cushion brilliant, cushion modified brilliant, antique cushion, and elongated cushion — CVD-grown and IGI-certified as standard, with GIA certification available on request.
What's the difference between the cushion cut types? Cushion brilliant is standard modern faceting; cushion modified brilliant adds extra facets for denser sparkle; antique cushion carries historical high-crown, open-culet faceting; elongated cushion has a rectangular rather than square outline. See our types of cushion cut guide for the full comparison.
Can I order a matched pair of cushion cut diamonds? Yes. Matched pairs for stud earrings or side stones are a standard request across our cushion inventory — see our matched pairs sourcing guide for how matching works.
How fast can I get a cushion cut stone or a finished custom piece? In-stock pieces ship same-day from New York. Made-to-order cutting plus a finished custom piece (CAD to jewelry) runs 4–6 days from our New York and Los Angeles desks.
