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Cushion|Lab Grown|IGI

2.57ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG653450606

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG653450606

Diamond specifications and retailer prices

From €355 EUR
HK$3,100 HKD
As of October 31, 2026
Save €1,153 EUR (76%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €1,508 EUR at Rare Carat · As of October 28, 2026
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 LG653450606 or 653450606. Listed at 10 retailers as of October 28, 2026, with prices from €355 to €1,508, a €1,153 spread on the same certified stone. Rare Carat lists it at €1,508. 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 angle36.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG653450606
Dimensions8.19 × 8.03 × 5.24 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.19 mm8.03 mm2.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG653450606
Side View
Table 62.0%Crown 36.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 65.3%

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 31
Current: €1,508 EUR|Low: €355 EUR|High: €3,187 EUR|Avg: €1,146 EUR
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 31, 2026
Retailer 11€355 EUR
Retailer 6€398 EUR
Retailer 8€456 EUR
Retailer 2€514 EUR
Retailer 13€521 EUR
Retailer 7€558 EUR
Retailer 10€588 EUR
Retailer 12€731 EUR
Retailer 9€1,275 EUR
Rare Carat€1,508 EUR
Retailer 3€1,536 EUR
Retailer 4€2,850 EUR
Retailer 5€3,187 EUR

4 data points across 13 retailers

10 retailers€355 EUR to €1,508 EUR

A
Cheapest Retailer
-
€355 EUR
HK$3,100 HKD
A
Retailer 2
-
€398 EUR
£350 GBP
View
A
Retailer 3
-
€456 EUR
$510 USD
View
A
Retailer 4
-
€514 EUR
View
B+
Retailer 5
-
€521 EUR
$582 USD
View
A
Retailer 6
-
€558 EUR
£491 GBP
View
A
Retailer 7
-
€588 EUR
$657 USD
View
A
Retailer 8
-
€731 EUR
$817 USD
View
B
Retailer 9
-
€1,275 EUR
£1,122 GBP
View
Most Expensive
B
Rare Carat
KI6064506KF653 · Oct 28
€1,508 EUR
$1,685 USD
View
9 more retailers have this diamond
Prices start from €355 EURSave up to €1,153 EUR

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
€355 EUR