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Cushion|Lab Grown|IGI

1.55ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG819628565

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

Certificate IGI LG819628565

Diamond specifications and retailer prices

From €186 EUR
$208 USD
As of November 1, 2026
Save €198 EUR (51%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €384 EUR at 77 Diamonds · As of November 1, 2026
View at 77 Diamonds

About this 1.55ct lab-grown cushion diamond

This 1.55ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG819628565 or 819628565. Listed at 2 retailers as of November 1, 2026, with prices from €186 to €384, a €198 spread on the same certified stone. 77 Diamonds lists it at €384. 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

1.55
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819628565
Dimensions6.74 × 6.64 × 4.51 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.74 mm6.64 mm1.55 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819628565
Side View
Table 62.0%Crown 34.3°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 67.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: €384 EUR|Low: €186 EUR|High: €435 EUR|Avg: €363 EUR|-10.0%
77 Diamonds
Retailer 2
Retailer 3
November 1, 2026
Retailer 2€186 EUR
Retailer 3€367 EUR
77 Diamonds€384 EUR

37 data points across 3 retailers

2 retailers€186 EUR to €384 EUR

A
Cheapest Retailer
-
€186 EUR
$208 USD
Final sale: no returns
Most Expensive
A
77 Diamonds
CUSTVSEGGT8YGW · Nov 1
€384 EUR
£338 GBP
View
1 more retailer has this diamond
Prices start from €186 EURSave up to €198 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
1.55ct Cushion
€186 EUR