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2.51ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG799669513

Shape and cutting style on the report: Round brilliant

Certificate IGI LG799669513

Diamond specifications and retailer prices

From $456 USD
As of November 1, 2026
Save $1,974 USD (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,430 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.51ct lab-grown round diamond

This 2.51ct lab-grown round sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG799669513 or 799669513. Listed at 13 retailers as of October 31, 2026, with prices from $456 to $2,430, a $1,974 spread on the same certified stone. Brilliant Earth lists it at $2,430. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799669513
Dimensions8.74 × 8.70 × 5.39 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
8.74 mm8.70 mm2.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799669513
Side View
Table 56.0%Crown 34.7°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.8%

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: Nov 1
Current: $2,430 USD|Low: $456 USD|High: $2,440 USD|Avg: $1,104 USD|-0.4%
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
November 2, 2026
Retailer 11$456 USD
Retailer 12$511 USD
Retailer 4$566 USD
Retailer 13$842 USD
Retailer 7$846 USD
Retailer 3$886 USD
Retailer 9$890 USD
Retailer 2$934 USD
Retailer 5$1,026 USD
Retailer 10$1,353 USD
Retailer 6$1,800 USD
Retailer 8$2,089 USD
Brilliant Earth$2,430 USD

34 data points across 13 retailers

13 retailers$456 USD to $2,430 USD

A
Cheapest Retailer
-
$456 USD
A
Retailer 2
-
$511 USD
View
Final sale: no returns
Retailer 3
-
$566 USD
View
Price last confirmed 16 days ago
A
Retailer 4
-
$842 USD
View
A
Retailer 5
-
$846 USD
€806 EUR
View
B+
Retailer 6
-
$886 USD
View
B+
Retailer 7
-
$890 USD
View
B+
Retailer 8
-
$934 USD
£735 GBP
View
B+
Retailer 9
-
$1,026 USD
View
B+
Retailer 10
-
$1,353 USD
View
B
Retailer 11
-
$1,800 USD
View
B
Retailer 12
-
$2,089 USD
£1,645 GBP
View
Most Expensive
B
Brilliant Earth
20554465A · Oct 31
$2,430 USD
View
12 more retailers have this diamond
Prices start from $456 USDSave up to $1,974 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 Round
$456 USD