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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 $555 CAD
HK$3,100 HKD
As of October 28, 2026
Save $1,439 CAD (72%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,188 CAD 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 9 retailers as of October 28, 2026, with a 259% 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 28
Current: $3,188 CAD|Low: $555 CAD|High: $5,151 CAD|Avg: $1,923 CAD
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 29, 2026
Retailer 10$555 CAD
Retailer 8$624 CAD
Retailer 6$714 CAD
Retailer 12$815 CAD
Retailer 2$872 CAD
Retailer 9$920 CAD
Retailer 13$1,101 CAD
Retailer 11$1,143 CAD
Retailer 7$1,994 CAD
Retailer 3$2,402 CAD
Rare Carat$3,188 CAD
Retailer 4$4,456 CAD
Retailer 5$5,151 CAD

2 data points across 13 retailers

9 retailers$555 CAD to $1,994 CAD

A
Cheapest Retailer
-
$555 CAD
HK$3,100 HKD
A
Retailer 2
-
$624 CAD
£351 GBP
View
Retailer 3
-
$714 CAD
$510 USD
View
B+
Retailer 4
-
$815 CAD
$582 USD
View
A
Retailer 5
-
$872 CAD
£491 GBP
View
Retailer 6
-
$920 CAD
$657 USD
View
A
Retailer 7
-
$1,143 CAD
$817 USD
View
Retailer 8
-
$1,994 CAD
£1,122 GBP
View
Most Expensive
B
Rare Carat
1279800
$3,188 CAD
$2,278 USD
View
8 more retailers have this diamond
Prices start from $555 CADSave up to $1,439 CAD

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
$555 CAD