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Round|Lab Grown|IGI

2.57ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG792663630

Shape and cutting style on the report: Round brilliant

Certificate IGI LG792663630

Diamond specifications and retailer prices

From $288 USD
As of October 26, 2026
Save $1,762 USD (86%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,050 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 2.57ct lab-grown round diamond

This 2.57ct lab-grown round 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 LG792663630 or 792663630. Listed at 19 retailers as of October 26, 2026, with prices from $288 to $2,050, a $1,762 spread on the same certified stone. Brilliant Earth lists it at $2,050. 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

2.57
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792663630
Dimensions8.87 × 8.83 × 5.38 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.87 mm8.83 mm2.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG792663630
Side View
Table 59.0%Crown 33.4°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.8%

Caratlytics Score

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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 26
Current: $2,050 USD|Low: $322 USD|High: $2,140 USD|Avg: $848 USD|-4.2%
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
Retailer 14
Retailer 15
October 29, 2026
Retailer 4$322 USD
Retailer 7$334 USD
Retailer 10$515 USD
Retailer 14$539 USD
Retailer 2$557 USD
Retailer 15$586 USD
Retailer 11$626 USD
Retailer 6$660 USD
Retailer 8$668 USD
Retailer 5$789 USD
Retailer 3$912 USD
Retailer 9$1,134 USD
Retailer 12$1,433 USD
Retailer 13$1,545 USD
Brilliant Earth$2,050 USD

40 data points across 15 retailers

19 retailers$288 USD to $2,050 USD

A
Cheapest Retailer
-
$288 USD
A
Retailer 2
-
$322 USD
View
Final sale: no returns
A
Retailer 3
-
$334 USD
View
A
Retailer 4
-
$357 USD
View
A
Retailer 5
-
$397 USD
HK$3,100 HKD
View
A
Retailer 6
-
$515 USD
View
Retailer 7
-
$539 USD
£425 GBP
View
Price last confirmed 13 days ago
A
Retailer 8
-
$557 USD
€530 EUR
View
B+
Retailer 9
-
$586 USD
View
A
Retailer 10
-
$626 USD
£493 GBP
View
A
Retailer 11
-
$660 USD
View
A
Retailer 12
-
$668 USD
A$1,028 AUD
View
A
Retailer 13
-
$789 USD
View
B+
Retailer 14
-
$912 USD
View
B+
Retailer 15
-
$1,134 USD
SGD 1,532 SGD
View
B+
Retailer 16
-
$1,148 USD
View
B+
Retailer 17
-
$1,433 USD
£1,128 GBP
View
Retailer 18
-
$1,545 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
19930280A · Oct 29
$2,050 USD
View
18 more retailers have this diamond
Prices start from $288 USDSave up to $1,762 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
2.57ct Round
$288 USD