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Round|Lab Grown|IGI

2.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG782620793

Shape and cutting style on the report: Round brilliant

Certificate IGI LG782620793

Diamond specifications and retailer prices

From $610 USD
As of November 2, 2026
Save $1,178 USD (66%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,788 USD at MOH London · As of November 1, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG782620793 or 782620793. Listed at 12 retailers as of November 1, 2026, with prices from $610 to $1,788, a $1,178 spread on the same certified stone. MOH London lists it at $1,788. 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 angle33.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG782620793
Dimensions8.74 × 8.70 × 5.32 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.74 mm8.70 mm2.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG782620793
Side View
Table 58.0%Crown 33.8°Girdle: MediumPavilion 40.6°Culet: NoneDepth 60.9%

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: Nov 2
Current: $1,788 USD|Low: $227 USD|High: $2,070 USD|Avg: $1,058 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 9$413 USD
Retailer 10$458 USD
Retailer 5$610 USD
Retailer 8$615 USD
Retailer 6$708 USD
Retailer 11$796 USD
Retailer 2$824 USD
Retailer 7$1,342 USD
Retailer 4$1,467 USD
Retailer 12$1,510 USD
MOH London$1,788 USD
Retailer 3$2,070 USD

33 data points across 12 retailers

12 retailers$610 USD to $1,788 USD

Retailer 1
-
$369 USD
Price last confirmed 34 days ago
Retailer 2
-
$428 USD
View
Price last confirmed 40 days ago
Retailer 3
-
$452 USD
View
Price last confirmed 33 days ago
A
Retailer 4
-
$610 USD
View
B+
Retailer 5
-
$615 USD
View
A
Retailer 6
-
$708 USD
€674 EUR
View
B+
Retailer 7
-
$796 USD
View
B+
Retailer 8
-
$824 USD
£649 GBP
View
B
Retailer 9
-
$1,342 USD
View
Retailer 10
-
$1,471 USD
View
Price last confirmed 33 days ago
B
Retailer 11
-
$1,510 USD
View
Most Expensive
B
MOH London
LG782620793 · Nov 1
$1,788 USD
£1,408 GBP
View
11 more retailers have this diamond
Prices start from $610 USDSave up to $1,178 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
$610 USD