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Radiant|Lab Grown|IGI

2.51ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG517226310

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

Certificate IGI LG517226310

Diamond specifications and retailer prices

From £1,464 GBP
As of November 6, 2026
Save £5,975 GBP (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £9,110 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 2.51ct lab-grown radiant diamond

This 2.51ct lab-grown radiant sits in the two to three carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG517226310 or 517226310. Listed at 14 retailers as of November 5, 2026, with a 408% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG517226310
Dimensions8.72 × 6.66 × 4.68 mm
L/W Ratio1.31
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.72 mm6.66 mm2.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG517226310
Side View
Table 69.0%Crown 48°Girdle: STK-THKPavilion 31.9°Culet: NoneDepth 70.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,529 GBP|Low: £1,464 GBP|High: £9,110 GBP|Avg: £4,808 GBP|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Reve Diamonds
November 7, 2026
Retailer 5£1,464 GBP
Retailer 4£3,003 GBP
Retailer 8£3,363 GBP
Retailer 6£3,483 GBP
Retailer 1£4,529 GBP
Retailer 3£4,619 GBP
Retailer 7£5,393 GBP
Retailer 2£7,440 GBP
Reve Diamonds£9,110 GBP

45 data points across 9 retailers

14 retailers£1,464 GBP to £7,440 GBP

B+
Cheapest Retailer
-
£1,464 GBP
B
Retailer 2
-
£3,003 GBP
View
B
Retailer 3
-
£3,147 GBP
View
B
Retailer 4
-
£3,167 GBP
View
B
Retailer 5
-
£3,363 GBP
View
Final sale: no returns
B
Retailer 6
-
£3,483 GBP
View
Retailer 7
-
£3,483 GBP
View
Price last confirmed 26 days ago
B
Retailer 8
-
£3,523 GBP
View
B
Retailer 9
-
£4,352 GBP
View
B
Retailer 10
-
£4,529 GBP
View
B
Retailer 11
-
£4,619 GBP
View
B
Retailer 12
-
£5,393 GBP
View
B
Retailer 13
-
£7,440 GBP
View
Most Expensive
Reve Diamonds
9D25E17C9 · Nov 6
£9,110 GBP
$12,194 USD
View
Price under review
13 more retailers have this diamond
Prices start from £1,464 GBPSave up to £5,975 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.

B+
2.51ct Radiant
£1,464 GBP