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Radiant|Lab Grown|IGI

2.51ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG636468728

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

Certificate IGI LG636468728

Diamond specifications and retailer prices

From HK$6,958 HKD
£698 GBP
As of October 29, 2026
2 retailers carry this diamond
Most expensive: HK$17,499 HKD at Rare Carat
View at Rare Carat

About this 2.51ct lab-grown radiant diamond

This 2.51ct lab-grown radiant sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG636468728 or 636468728. Listed at 2 retailers as of October 29, 2026. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.9°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG636468728
Dimensions9.62 × 6.78 × 4.59 mm
L/W Ratio1.42
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.62 mm6.78 mm2.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG636468728
Side View
Table 63.0%Crown 42.9°Girdle: MediumPavilion 34.7°Culet: NoneDepth 67.7%

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: Oct 29
Current: HK$17,499 HKD|Low: HK$2,570 HKD|High: HK$33,580 HKD|Avg: HK$11,678 HKD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
April 6, 2026
Retailer 2HK$3,065 HKD
Retailer 8HK$3,939 HKD
Retailer 3HK$5,013 HKD
Retailer 6HK$5,178 HKD
Retailer 5HK$6,520 HKD
Retailer 4HK$8,646 HKD
Retailer 7HK$9,675 HKD
Rare CaratHK$17,499 HKD
Retailer 9HK$20,870 HKD

55 data points across 9 retailers

2 retailers

B+
Cheapest Retailer
-
HK$6,958 HKD
£698 GBP
Most Expensive
Rare Carat
636468728
HK$17,499 HKD
$2,230 USD
View
1 more retailer has this diamond
Prices start from HK$6,958 HKD

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
HK$6,958 HKD