Buy round brilliant – certified round brilliant diamonds

Buy round brilliant diamonds

The round brilliant is the 57- or 58-facet round cut most people picture when they say "diamond". Here you find every round brilliant in our stock with a GIA or HRD report, a price in US dollars and insured shipping.

More about this cut

The modern brilliant cut goes back to calculations by Marcel Tolkowsky in 1919: 33 facets on the crown, 24 or 25 on the pavilion, arranged to return as much light as possible through the table. The round brilliant is the only shape for which GIA assigns its own cut grade, from Excellent to Poor, because the proportions of a round stone can be assessed exactly. For every other shape GIA grades only polish and symmetry.

What to look at on the report: cut, polish and symmetry ideally "Excellent", a table between 54 and 60 percent, total depth between 59 and 63 percent. Fluorescence is a property, not a grade; in colourless stones (D–F) strong fluorescence can make a stone look hazy, from G–H it is usually unnoticeable.

The listing below shows round brilliants only. Use the configurator to narrow by carat, colour, clarity, cut grade, polish, symmetry, fluorescence and price; every report number links to the laboratory's verification service.

95 diamonds

Shape	Carat	Colour	Clarity	Cut	Polish	Symmetry	Fluor.	Certificate	Price
Round Brilliant	6.06	L	I1	Very good	Very good	Excellent	None	GIA 6247044263	US$45,995
Round Brilliant	4.05	G	IF	Excellent	Excellent	Excellent	None	HRD Antwerp 26000041751	US$203,500
Round Brilliant	4.02	D	VVS1	Excellent	Excellent	Excellent	None	GIA 5222181907	US$285,219
Round Brilliant	4.02	D	VVS1	Excellent	Excellent	Excellent	None	GIA 2221623498	US$285,219
Round Brilliant	4.01	D	VVS1	Excellent	Excellent	Excellent	None	GIA 2215637439	US$284,510
Round Brilliant	4.01	D	VVS1	Excellent	Excellent	Excellent	None	GIA 2225091821	US$284,510
Round Brilliant	4.01	D	VVS1	Excellent	Excellent	Excellent	None	GIA 1485226496	US$284,510
Round Brilliant	2.02	O	VS2	Excellent	Excellent	Very good	None	GIA 5242044278	US$10,666
Round Brilliant	2.02	E	VS1	Excellent	Excellent	Excellent	None	GIA 3475421537	US$42,218
Round Brilliant	2.01	F	VS2	Excellent	Excellent	Excellent	None	GIA 2476388210	US$33,165
Round Brilliant	2.01	D	VS1	Excellent	Excellent	Excellent	None	GIA 2477221732	US$45,326
Round Brilliant	2.00	K	SI2	Excellent	Excellent	Very good	None	GIA 2245044322	US$11,660
Round Brilliant	2.00	E	VS2	Excellent	Excellent	Excellent	None	GIA 2466649662	US$35,200
Round Brilliant	2.00	E	VS2	Excellent	Excellent	Excellent	None	GIA 1479401774	US$35,200
Round Brilliant	2.00	E	VS1	Excellent	Excellent	Excellent	None	GIA 7471232705	US$41,800
Round Brilliant	1.41	J	SI1	Excellent	Excellent	Excellent	None	GIA 1236908910	US$4,033
Round Brilliant	1.22	F	I2	Very good	Excellent	Excellent	None	GIA 2231922935	US$2,818
Round Brilliant	1.10	J	VS1	Excellent	Excellent	Excellent	None	GIA 1236908935	US$3,751
Round Brilliant	1.08	E	VVS2	Excellent	Excellent	Excellent	None	GIA 6511645166	US$9,623
Round Brilliant	1.06	G	VS1	Excellent	Excellent	Excellent	None	GIA 2235908917	US$6,296
Round Brilliant	1.05	E	VVS2	Excellent	Excellent	Excellent	None	GIA 2517473835	US$9,356
Round Brilliant	1.04	E	VVS2	Excellent	Excellent	Excellent	None	GIA 1499330685	US$9,266
Round Brilliant	1.02	J	I1	Excellent	Excellent	Excellent	None	GIA 2231922921	US$2,244
Round Brilliant	1.01	E	VVS2	Excellent	Excellent	Excellent	None	GIA 6495897953	US$8,999

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.