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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 $303 USD
As of October 30, 2026
Save $1,777 USD (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,080 USD 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 30, 2026, with prices from $303 to $2,080, a $1,777 spread on the same certified stone. Brilliant Earth lists it at $2,080. 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
Color
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

How it works →
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: Oct 30
Current: $2,080 USD|Low: $291 USD|High: $2,140 USD|Avg: $1,029 USD|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 7$303 USD
Retailer 3$464 USD
Retailer 4$607 USD
Retailer 6$1,154 USD
Retailer 5$1,155 USD
Retailer 2$1,505 USD
Brilliant Earth$2,080 USD

28 data points across 7 retailers

9 retailers$303 USD to $2,080 USD

A
Cheapest Retailer
-
$303 USD
A
Retailer 2
-
$351 USD
View
A
Retailer 3
-
$464 USD
£365 GBP
View
A
Retailer 4
-
$607 USD
€578 EUR
View
B+
Retailer 5
-
$1,154 USD
View
B+
Retailer 6
-
$1,155 USD
View
B+
Retailer 7
-
$1,207 USD
View
B+
Retailer 8
-
$1,505 USD
£1,185 GBP
View
Most Expensive
B
Brilliant Earth
21252513A · Oct 31
$2,080 USD
View
8 more retailers have this diamond
Prices start from $303 USDSave up to $1,777 USD

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
$303 USD