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Round|Lab Grown|IGI

1.20ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG840633327

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840633327

Diamond specifications and retailer prices

From £191 GBP
$256 USD
As of October 29, 2026
Save £1,130 GBP (86%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,321 GBP at Brilliant Earth · As of October 29, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840633327 or 840633327. Listed at 21 retailers as of October 29, 2026, with prices from £191 to £1,321, a £1,130 spread on the same certified stone. Brilliant Earth lists it at £1,321. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840633327
Dimensions6.74 × 6.78 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.74 mm6.78 mm1.20 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840633327
Side View
Table 58.0%Crown 35.9°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.4%

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: Oct 29
Current: £1,321 GBP|Low: £191 GBP|High: £1,552 GBP|Avg: £564 GBP|-14.9%
Brilliant Earth
Retailer 2
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Retailer 21
October 31, 2026
Retailer 9£191 GBP
Retailer 10£214 GBP
Retailer 5£222 GBP
Retailer 3£237 GBP
Retailer 12£237 GBP
Retailer 2£358 GBP
Retailer 13£377 GBP
Retailer 16£396 GBP
Retailer 6£396 GBP
Retailer 17£407 GBP
Retailer 7£424 GBP
Retailer 15£451 GBP
Retailer 8£524 GBP
Retailer 4£728 GBP
Retailer 14£763 GBP
Retailer 20£768 GBP
Retailer 11£801 GBP
Retailer 19£840 GBP
Retailer 18£952 GBP
Retailer 21£1,116 GBP
Brilliant Earth£1,321 GBP

23 data points across 21 retailers

21 retailers£191 GBP to £1,321 GBP

A
Cheapest Retailer
-
£191 GBP
$256 USD
A
Retailer 2
-
£214 GBP
$287 USD
View
Final sale: no returns
A
Retailer 3
-
£222 GBP
$297 USD
View
A
Retailer 4
-
£237 GBP
$318 USD
View
A
Retailer 5
-
£237 GBP
$318 USD
View
A
Retailer 6
-
£358 GBP
$480 USD
View
A
Retailer 7
-
£377 GBP
View
A
Retailer 8
-
£396 GBP
€505 EUR
View
A
Retailer 9
-
£396 GBP
$531 USD
View
A
Retailer 10
-
£407 GBP
ZAR 8,820 ZAR
View
A
Retailer 11
-
£424 GBP
$568 USD
View
A
Retailer 12
-
£451 GBP
View
B+
Retailer 13
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£524 GBP
$702 USD
View
B+
Retailer 14
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£728 GBP
$976 USD
View
B+
Retailer 15
-
£763 GBP
$1,022 USD
View
B+
Retailer 16
-
£768 GBP
SGD 1,391 SGD
View
B+
Retailer 17
-
£801 GBP
$1,073 USD
View
B+
Retailer 18
-
£840 GBP
$1,125 USD
View
B+
Retailer 19
-
£952 GBP
View
Retailer 20
-
£1,116 GBP
$1,495 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
21729036A · Oct 29
£1,321 GBP
$1,770 USD
View
20 more retailers have this diamond
Prices start from £191 GBPSave up to £1,130 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
£191 GBP