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Cushion|Lab Grown|IGI

2.57ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG705535137

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG705535137

Diamond specifications and retailer prices

From $397 USD
HK$3,100 HKD
As of October 30, 2026
Save $1,288 USD (76%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,278 USD at Rare Carat
View at Rare Carat

About this 2.57ct lab-grown cushion diamond

This 2.57ct lab-grown cushion 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 LG705535137 or 705535137. Listed at 10 retailers as of October 28, 2026, with a 325% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle36.3°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG705535137
Dimensions8.01 × 7.95 × 5.29 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.01 mm7.95 mm2.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG705535137
Side View
Table 63.0%Crown 36.3°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 66.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $2,278 USD|Low: $397 USD|High: $3,680 USD|Avg: $1,353 USD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 10$397 USD
Retailer 8$446 USD
Retailer 6$510 USD
Retailer 12$582 USD
Retailer 2$624 USD
Retailer 9$657 USD
Retailer 13$786 USD
Retailer 11$817 USD
Retailer 7$1,425 USD
Retailer 3$1,716 USD
Rare Carat$2,278 USD
Retailer 4$3,184 USD
Retailer 5$3,680 USD

3 data points across 13 retailers

10 retailers$397 USD to $1,685 USD

A
Cheapest Retailer
-
$397 USD
HK$3,100 HKD
A
Retailer 2
-
$446 USD
£351 GBP
View
A
Retailer 3
-
$510 USD
View
B+
Retailer 4
-
$582 USD
View
A
Retailer 5
-
$624 USD
£491 GBP
View
A
Retailer 6
-
$657 USD
View
B+
Retailer 7
-
$817 USD
View
B
Retailer 8
-
$1,425 USD
£1,122 GBP
View
B
Retailer 9
-
$1,685 USD
View
Most Expensive
Rare Carat
1279800
$2,278 USD
View
9 more retailers have this diamond
Prices start from $397 USDSave up to $1,288 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 Cushion
$397 USD