Radiant|Lab Grown|IGI

2.51ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG833607629

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG833607629

Diamond specifications and retailer prices

From £226 GBP
$303 USD
As of November 2, 2026
Save £1,326 GBP (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,552 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.51ct lab-grown radiant diamond

This 2.51ct lab-grown radiant sits in the two to three carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG833607629 or 833607629. Listed at 9 retailers as of October 31, 2026, with prices from £226 to £1,552, a £1,326 spread on the same certified stone. Brilliant Earth lists it at £1,552. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.3°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833607629
Dimensions9.19 × 6.79 × 4.74 mm
L/W Ratio1.35
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.19 mm6.79 mm2.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833607629
Side View
Table 64.0%Crown 40.3°Girdle: MediumPavilion 36.9°Culet: NoneDepth 69.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: £1,552 GBP|Low: £217 GBP|High: £1,597 GBP|Avg: £768 GBP|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7£226 GBP
Retailer 2£346 GBP
Retailer 4£453 GBP
Retailer 6£861 GBP
Retailer 5£862 GBP
Retailer 3£1,123 GBP
Brilliant Earth£1,552 GBP

29 data points across 7 retailers

9 retailers£226 GBP to £1,552 GBP

A
Cheapest Retailer
-
£226 GBP
$303 USD
A
Retailer 2
-
£262 GBP
$351 USD
View
A
Retailer 3
-
£346 GBP
View
A
Retailer 4
-
£453 GBP
€578 EUR
View
B+
Retailer 5
-
£861 GBP
$1,154 USD
View
B+
Retailer 6
-
£862 GBP
$1,155 USD
View
B+
Retailer 7
-
£901 GBP
$1,207 USD
View
B+
Retailer 8
-
£1,123 GBP
View
Most Expensive
B
Brilliant Earth
21252513A · Oct 31
£1,552 GBP
$2,080 USD
View
8 more retailers have this diamond
Prices start from £226 GBPSave up to £1,326 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
2.51ct Radiant
£226 GBP