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Round|Lab Grown|IGI

1.03ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG818654351

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818654351

Diamond specifications and retailer prices

From £170 GBP
$227 USD
As of October 29, 2026
Save £971 GBP (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,141 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.03ct lab-grown round diamond

This 1.03ct 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 LG818654351 or 818654351. Listed at 15 retailers as of October 29, 2026, with prices from £170 to £1,141, a £971 spread on the same certified stone. Brilliant Earth lists it at £1,141. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818654351
Dimensions6.48 × 6.44 × 4.00 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
6.48 mm6.44 mm1.03 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818654351
Side View
Table 56.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

Caratlytics Score

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A+
Exceptional
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: £1,141 GBP|Low: £170 GBP|High: £1,171 GBP|Avg: £542 GBP|-2.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 29, 2026
Retailer 14£170 GBP
Retailer 15£191 GBP
Retailer 11£197 GBP
Retailer 5£212 GBP
Retailer 12£212 GBP
Retailer 2£356 GBP
Retailer 9£363 GBP
Retailer 13£401 GBP
Retailer 4£575 GBP
Retailer 6£680 GBP
Retailer 10£682 GBP
Retailer 3£719 GBP
Retailer 7£742 GBP
Retailer 8£852 GBP
Brilliant Earth£1,141 GBP

30 data points across 15 retailers

15 retailers£170 GBP to £1,141 GBP

A+
Cheapest Retailer
-
£170 GBP
$227 USD
A
Retailer 2
-
£191 GBP
$254 USD
View
Final sale: no returns
A
Retailer 3
-
£197 GBP
$263 USD
View
A
Retailer 4
-
£212 GBP
$282 USD
View
A
Retailer 5
-
£212 GBP
$282 USD
View
A
Retailer 6
-
£356 GBP
€451 EUR
View
A
Retailer 7
-
£363 GBP
ZAR 7,814 ZAR
View
A
Retailer 8
-
£401 GBP
$534 USD
View
B+
Retailer 9
-
£575 GBP
SGD 1,034 SGD
View
B+
Retailer 10
-
£680 GBP
$905 USD
View
B+
Retailer 11
-
£682 GBP
$908 USD
View
B+
Retailer 12
-
£719 GBP
$958 USD
View
B
Retailer 13
-
£737 GBP
$981 USD
View
B+
Retailer 14
-
£852 GBP
View
Most Expensive
B
Brilliant Earth
21433651A · Oct 29
£1,141 GBP
$1,520 USD
View
14 more retailers have this diamond
Prices start from £170 GBPSave up to £971 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+
1.03ct Round
£170 GBP