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Round|Lab Grown|IGI

1.20ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG837615667

Shape and cutting style on the report: Round brilliant

Certificate IGI LG837615667

Diamond specifications and retailer prices

From £176 GBP
$236 USD
As of November 1, 2026
Save £927 GBP (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,103 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG837615667 or 837615667. Listed at 20 retailers as of November 1, 2026, with prices from £176 to £1,103, a £927 spread on the same certified stone. Brilliant Earth lists it at £1,103. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837615667
Dimensions6.92 × 6.87 × 4.13 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.92 mm6.87 mm1.20 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837615667
Side View
Table 60.0%Crown 33.6°Girdle: MediumPavilion 40.9°Culet: NoneDepth 59.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,103 GBP|Low: £174 GBP|High: £1,103 GBP|Avg: £477 GBP
Brilliant Earth
Retailer 2
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Retailer 12
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Retailer 20
November 2, 2026
Retailer 17£176 GBP
Retailer 3£197 GBP
Retailer 7£204 GBP
Retailer 10£216 GBP
Retailer 4£218 GBP
Retailer 5£300 GBP
Retailer 2£346 GBP
Retailer 14£368 GBP
Retailer 16£377 GBP
Retailer 19£396 GBP
Retailer 15£408 GBP
Retailer 12£518 GBP
Retailer 9£528 GBP
Retailer 13£552 GBP
Retailer 6£702 GBP
Retailer 20£741 GBP
Retailer 8£872 GBP
Retailer 18£976 GBP
Retailer 11£995 GBP
Brilliant Earth£1,103 GBP

23 data points across 20 retailers

20 retailers£176 GBP to £1,103 GBP

A
Cheapest Retailer
-
£176 GBP
$236 USD
A
Retailer 2
-
£197 GBP
$265 USD
View
Final sale: no returns
A
Retailer 3
-
£204 GBP
$274 USD
View
Retailer 4
-
£216 GBP
$290 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£218 GBP
$293 USD
View
A
Retailer 6
-
£300 GBP
$402 USD
View
A
Retailer 7
-
£346 GBP
View
A
Retailer 8
-
£368 GBP
€470 EUR
View
A
Retailer 9
-
£377 GBP
ZAR 8,171 ZAR
View
A
Retailer 10
-
£396 GBP
$532 USD
View
A
Retailer 11
-
£408 GBP
View
B+
Retailer 12
-
£518 GBP
$695 USD
View
B+
Retailer 13
-
£528 GBP
A$1,090 AUD
View
B+
Retailer 14
-
£552 GBP
$741 USD
View
B+
Retailer 15
-
£702 GBP
$942 USD
View
B+
Retailer 16
-
£741 GBP
$994 USD
View
B+
Retailer 17
-
£872 GBP
View
B+
Retailer 18
-
£976 GBP
$1,309 USD
View
B
Retailer 19
-
£995 GBP
$1,335 USD
View
Most Expensive
B
Brilliant Earth
21690652A · Nov 2
£1,103 GBP
$1,480 USD
View
19 more retailers have this diamond
Prices start from £176 GBPSave up to £927 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.20ct Round
£176 GBP