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2.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG581309268

Shape and cutting style on the report: Round brilliant

Certificate IGI LG581309268

Diamond specifications and retailer prices

From $597 USD
As of October 30, 2026
Save $869 USD (59%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,466 USD at MOH London · As of October 29, 2026
View at MOH London

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 LG581309268 or 581309268. Listed at 5 retailers as of October 29, 2026, with prices from $597 to $1,466, a $869 spread on the same certified stone. MOH London lists it at $1,466. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG581309268
Dimensions8.73 × 8.71 × 5.40 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.
Top View
8.73 mm8.71 mm2.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG581309268
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.9%

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: $1,466 USD|Low: $490 USD|High: $5,210 USD|Avg: $2,156 USD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 3$597 USD
Retailer 2$641 USD
Retailer 5$663 USD
Retailer 4$969 USD
MOH London$1,466 USD
Retailer 6$5,210 USD
Retailer 7$5,210 USD

32 data points across 7 retailers

5 retailers$597 USD to $1,466 USD

B+
Cheapest Retailer
-
$597 USD
A
Retailer 2
-
$641 USD
£505 GBP
View
A
Retailer 3
-
$663 USD
View
B+
Retailer 4
-
$969 USD
View
Most Expensive
B
MOH London
LG581309268 · Oct 29
$1,466 USD
£1,154 GBP
View
4 more retailers have this diamond
Prices start from $597 USDSave up to $869 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
$597 USD