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Round|Lab Grown|IGI

1.51ct G IF Round Lab Grown Diamond

ID • G/IF • IGI LG823679340

Shape and cutting style on the report: Round brilliant

Certificate IGI LG823679340

Diamond specifications and retailer prices

From £287 GBP
HK$3,000 HKD
As of November 1, 2026
Save £1,221 GBP (81%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,508 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG823679340 or 823679340. Listed at 24 retailers as of October 31, 2026, with prices from £287 to £1,508, a £1,221 spread on the same certified stone. Brilliant Earth lists it at £1,508. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
G
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823679340
Dimensions7.32 × 7.34 × 4.50 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.32 mm7.34 mm1.51 ctG / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823679340
Side View
Table 60.0%Crown 33.4°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.4%

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: Nov 1
Current: £1,508 GBP|Low: £336 GBP|High: £1,769 GBP|Avg: £773 GBP|-12.2%
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
November 2, 2026
Retailer 10£336 GBP
Retailer 14£336 GBP
Retailer 12£402 GBP
Retailer 8£412 GBP
Retailer 2£450 GBP
Retailer 13£555 GBP
Retailer 11£597 GBP
Retailer 15£629 GBP
Retailer 5£805 GBP
Retailer 3£816 GBP
Retailer 7£913 GBP
Retailer 9£955 GBP
Retailer 4£1,055 GBP
Retailer 6£1,396 GBP
Brilliant Earth£1,508 GBP

35 data points across 15 retailers

24 retailers£287 GBP to £1,508 GBP

Retailer 1
-
£194 GBP
$260 USD
Price last confirmed 15 days ago
Retailer 2
-
£231 GBP
$309 USD
View
Price last confirmed 20 days ago
Retailer 3
-
£246 GBP
$330 USD
View
Price last confirmed 31 days ago
Retailer 4
-
£246 GBP
$330 USD
View
Price last confirmed 17 days ago
A
Retailer 5
-
£287 GBP
HK$3,000 HKD
View
B+
Retailer 6
-
£336 GBP
$450 USD
View
A
Retailer 7
-
£336 GBP
$450 USD
View
A
Retailer 8
-
£402 GBP
€513 EUR
View
A
Retailer 9
-
£412 GBP
ZAR 8,909 ZAR
View
A
Retailer 10
-
£450 GBP
View
A
Retailer 11
-
£555 GBP
A$1,145 AUD
View
A
Retailer 12
-
£597 GBP
$800 USD
View
B+
Retailer 13
-
£629 GBP
$843 USD
View
Retailer 14
-
£775 GBP
$1,038 USD
View
Price last confirmed 15 days ago
B+
Retailer 15
-
£805 GBP
$1,078 USD
View
B+
Retailer 16
-
£816 GBP
SGD 1,477 SGD
View
B+
Retailer 17
-
£913 GBP
$1,223 USD
View
B+
Retailer 18
-
£955 GBP
View
B
Retailer 19
-
£1,055 GBP
$1,414 USD
View
Retailer 20
-
£1,392 GBP
$1,865 USD
View
Price last confirmed 12 days ago
Retailer 21
-
£1,396 GBP
$1,870 USD
View
Price last confirmed 12 days ago
Retailer 22
-
£1,399 GBP
$1,875 USD
View
Price last confirmed 12 days ago
Retailer 23
-
£1,410 GBP
$1,889 USD
View
Price last confirmed 54 days ago
Most Expensive
B
Brilliant Earth
21101265A · Oct 31
£1,508 GBP
$2,020 USD
View
23 more retailers have this diamond
Prices start from £287 GBPSave up to £1,221 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
1.51ct Round
£287 GBP