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Cushion|Lab Grown|IGI

1.59ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG455010380

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

Certificate IGI LG455010380

Diamond specifications and retailer prices

From €359 EUR
$401 USD
As of October 30, 2026
Save €1,780 EUR (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €2,139 EUR at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.59ct lab-grown cushion diamond

This 1.59ct 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 LG455010380 or 455010380. Listed at 9 retailers as of October 30, 2026, with prices from €359 to €2,139, a €1,780 spread on the same certified stone. Do Amore Diamonds lists it at €2,139. 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

1.59
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG455010380
Dimensions6.76 × 6.74 × 4.60 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa.
Top View
6.76 mm6.74 mm1.59 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG455010380
Side View
Table 60.0%Crown 35.3°Girdle: STK-VTKPavilion 40.8°Culet: NoneDepth 68.2%

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: €2,139 EUR|Low: €359 EUR|High: €2,139 EUR|Avg: €894 EUR
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 4€359 EUR
Retailer 5€495 EUR
Retailer 3€579 EUR
Retailer 7€796 EUR
Retailer 8€1,071 EUR
Retailer 6€1,207 EUR
Retailer 2€1,320 EUR
Do Amore Diamonds€2,139 EUR

34 data points across 8 retailers

9 retailers€359 EUR to €2,139 EUR

A
Cheapest Retailer
-
€359 EUR
$401 USD
A
Retailer 2
-
€439 EUR
$490 USD
View
B+
Retailer 3
-
€495 EUR
$553 USD
View
B+
Retailer 4
-
€579 EUR
£510 GBP
View
B+
Retailer 5
-
€796 EUR
$889 USD
View
B
Retailer 6
-
€1,071 EUR
$1,196 USD
View
B
Retailer 7
-
€1,207 EUR
$1,348 USD
View
B
Retailer 8
-
€1,320 EUR
£1,161 GBP
View
Most Expensive
B
Do Amore Diamonds
27-363F4265B · Oct 31
€2,139 EUR
$2,390 USD
View
8 more retailers have this diamond
Prices start from €359 EURSave up to €1,780 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
1.59ct Cushion
€359 EUR