Buy cushion cut – certified cushion cut diamonds

Buy cushion cut diamonds

The cushion cut is a square or rectangular brilliant cut with rounded corners and soft sides – the outline of the historical old mine cut, with modern faceting. Here you find every cushion in our stock with a laboratory report, including stones in the old mine style.

More about this cut

There are two facet arrangements, distinguished on the report: "Cushion Brilliant" with large pavilion facets, which shows broader flashes of light, and "Cushion Modified Brilliant" with an additional row of facets, which sparkles more finely ("crushed ice"). Which one you prefer is a matter of taste; both are fully fledged cuts. The old mine cut is the eighteenth- and nineteenth-century predecessor with a small table, high crown and large culet.

What to look at: length-to-width ratio 1.00–1.05 for square cushions, from 1.10 for rectangular ones. Cushions hold colour slightly more than round brilliants, which is why they also suit fancy colours. There is no GIA cut grade; polish and symmetry should be "Excellent" or "Very Good".

The listing below shows cushions only. Every report number can be verified with the laboratory; the exact shape is stated on the report under "Shape and Cutting Style".

14 diamonds

Shape	Carat	Colour	Clarity	Cut	Polish	Symmetry	Fluor.	Certificate	Price
Cushion	5.05	Fancy Pink	—	Excellent	Very good	Very good	None	GIA 6234079900	US$3,500,000
Cushion Modified Brilliant	4.02	G	SI2	Excellent	Excellent	Excellent	None	GIA 6237929889	US$82,775
Cushion	2.63	H	I2	Excellent	Excellent	Very good	Faint	GIA 2235929900	US$7,232
Cushion	2.63	N	VS2	Excellent	Excellent	Excellent	Faint	GIA 2245044273	US$10,415
Cushion	2.50	N	SI1	Excellent	Very good	Very good	None	GIA 5241044302	US$9,625
Cushion Modified Brilliant	2.12	H	VVS2	Excellent	Excellent	Excellent	Faint	GIA 6451803516	US$27,984
Cushion	2.04	M	VS1	Excellent	Excellent	Very good	Faint	GIA 6243044275	US$8,527
Cushion Modified Brilliant	2.01	G	VVS1	Excellent	Excellent	Excellent	Faint	GIA 6545188480	US$35,376
Cushion	2.00	N	SI1	Excellent	Very good	Good	None	GIA 1242044298	US$7,700
Cushion	1.25	K	I1	Excellent	Very good	Very good	None	GIA 2243044307	US$2,338
Cushion	1.11	F	VVS1	Excellent	Excellent	Excellent	None	GIA 6237908892	US$8,303
Cushion Modified Brilliant	1.04	D	I1	Excellent	Excellent	Very good	Faint	GIA 5231922902	US$3,546
Cushion Modified Brilliant	1.03	G	SI2	Excellent	Excellent	Excellent	Medium	GIA 2235922905	US$3,739
Old Mine Cut	1.02	H	VS1	Excellent	Excellent	Excellent	None	GIA 2235930921	US$5,161

How to buy a certified diamond at STIG International

At STIG International you buy natural diamonds with an independent laboratory report directly online: choose the stone in the listing, verify its report number with the laboratory, pay via Stripe or bank transfer and receive it insured with the original certificate.

Choosing the stone

Every diamond in the listing is a specific, individual stone with its own report number – no placeholder, no sample goods. With the configurator you narrow the stock by cut (round brilliant, princess, emerald, pear, marquise, cushion, oval), carat, colour, clarity, cut grade, polish, symmetry, fluorescence, laboratory and price. Carat is a unit of weight: 1 ct = 0.2 g. Colour is graded from D (colourless) to Z, clarity from FL (flawless) to I3.

The stone's page shows every value exactly as it appears on the report, plus a 3D model of the cut. The price is in US dollars and includes insured shipping.

Verifying the report

Every stone carries a report from the Gemological Institute of America (GIA), the International Gemological Institute (IGI) or HRD Antwerp. The report number on the stone's page links straight to the laboratory's verification service – GIA Report Check, IGI Verify or HRD Antwerp – which shows the laboratory's original data. Compare weight, colour, clarity and measurements with ours before you buy. GIA stones additionally carry the report number as a microscopic laser inscription on the girdle.

Paying

In the shop you pay via Stripe by credit card, Apple Pay, Google Pay or SEPA direct debit; card details are entered at Stripe only and never reach our servers. Bank transfer is available by arrangement. The stone is reserved for you while you pay.

Shipping and handover

The stone is shipped insured with a specialised courier, usually within 7 to 14 working days, and handed over only against proof of identity. The laboratory's original certificate is enclosed. On request you can also view stones at our office in Dubai. We clarify with you before the purchase which import charges apply in your country.

Withdrawal

Consumers in the EU have a statutory right of withdrawal of 14 days from receipt of the stone. We do not offer voluntary returns beyond that. Details are in the cancellation policy and the terms and conditions.

What you can hold us to

STIG International Gemstone FZCO DMCC is registered in the DMCC commercial register in Dubai (DMCC-1007195) and trades under its compliance, KYC and anti-money-laundering rules. We source only diamonds whose origin is documented under the Kimberley Process, and we work with the law firm Kayrouz & Associates for escrow. More on the certifications page. We are a dealer, not an investment adviser: we sell a physical product and make no statements about price developments.

Certified origin, verifiable quality

A natural diamond is a physical product that is passed on across generations. Whoever buys one should know where it comes from and what it is: we deal exclusively in natural, untreated stones whose origin is documented under the Kimberley Process and whose quality an independent laboratory has established.

Every stone in this overview has been pre-qualified by us: natural, untreated, conflict-free and graded by one of the three leading laboratories. The report number takes you straight to the original at the institute — check for yourself before you talk to us.

Call us+971 559 940 142We are happy to advise you personally

The stone first, the setting later

To give a diamond is to give something that stays. Whether as a loose stone in a sealed blister or set later into a ring, a necklace or earrings — the decision about the setting can wait; the one about the stone cannot.

Choose the stone first. For the setting we accompany you and work with goldsmiths we have known for years.

How to judge a diamond

The four Cs — carat, colour, clarity, cut — are the beginning, not the end. A high-grade stone must also be untreated, have documented fluorescence and reach at least “Very Good” in polish and symmetry. The fifth C, the certificate, makes all of it verifiable.

That is why we show every value exactly as it appears on the report — and link the report.

What to expect from STIG

We deal exclusively in natural, certified diamonds from 0.30 ct. Every stone carries a report from GIA, IGI or HRD Antwerp; the report number is linked in the shop and can be checked at the institute in seconds.

Stones can be viewed at our office in Dubai or sent to you under insurance for inspection. The price you see is the price.