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Round|Lab Grown|IGI

1.51ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG818644680

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818644680

Diamond specifications and retailer prices

From £244 GBP
$327 USD
As of November 1, 2026
Save £1,880 GBP (89%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £2,124 GBP at Brilliant Earth · As of November 2, 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 F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818644680 or 818644680. Listed at 23 retailers as of November 1, 2026, with prices from £244 to £2,124, a £1,880 spread on the same certified stone. Brilliant Earth lists it at £2,124. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818644680
Dimensions7.34 × 7.37 × 4.48 mm
L/W Ratio1.00
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
7.34 mm7.37 mm1.51 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818644680
Side View
Table 60.0%Crown 35.3°Girdle: MediumPavilion 40.5°Culet: NoneDepth 60.9%

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: £2,124 GBP|Low: £234 GBP|High: £2,496 GBP|Avg: £787 GBP|-14.9%
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
November 2, 2026
Retailer 3£244 GBP
Retailer 5£302 GBP
Retailer 4£406 GBP
Retailer 13£417 GBP
Retailer 8£428 GBP
Retailer 7£484 GBP
Retailer 9£520 GBP
Retailer 10£534 GBP
Retailer 12£703 GBP
Retailer 2£756 GBP
Retailer 6£1,140 GBP
Retailer 11£1,209 GBP
Retailer 14£1,446 GBP
Brilliant Earth£2,124 GBP

33 data points across 14 retailers

23 retailers£244 GBP to £2,124 GBP

A
Cheapest Retailer
-
£244 GBP
$327 USD
A
Retailer 2
-
£273 GBP
$366 USD
View
Final sale: no returns
A
Retailer 3
-
£282 GBP
$379 USD
View
A
Retailer 4
-
£302 GBP
$405 USD
View
Retailer 5
-
£302 GBP
$405 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
£334 GBP
HK$3,500 HKD
View
A
Retailer 7
-
£406 GBP
$545 USD
View
A
Retailer 8
-
£417 GBP
$560 USD
View
A
Retailer 9
-
£428 GBP
View
A
Retailer 10
-
£484 GBP
€618 EUR
View
A
Retailer 11
-
£520 GBP
ZAR 11,283 ZAR
View
A
Retailer 12
-
£534 GBP
View
B+
Retailer 13
-
£644 GBP
$864 USD
View
B+
Retailer 14
-
£703 GBP
A$1,452 AUD
View
B+
Retailer 15
-
£756 GBP
$1,014 USD
View
B+
Retailer 16
-
£958 GBP
$1,286 USD
View
B
Retailer 17
-
£966 GBP
SGD 1,752 SGD
View
B
Retailer 18
-
£970 GBP
$1,302 USD
View
B
Retailer 19
-
£1,003 GBP
$1,346 USD
View
B
Retailer 20
-
£1,140 GBP
$1,530 USD
View
B+
Retailer 21
-
£1,209 GBP
View
Retailer 22
-
£1,446 GBP
$1,940 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
21133635A · Nov 2
£2,124 GBP
$2,850 USD
View
22 more retailers have this diamond
Prices start from £244 GBPSave up to £1,880 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
£244 GBP