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Cushion|Lab Grown|IGI

5.05ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG620431176

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG620431176

Diamond specifications and retailer prices

From €945 EUR
$1,056 USD
As of October 31, 2026
Save €3,593 EUR (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €4,538 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 5.05ct lab-grown cushion diamond

This 5.05ct lab-grown cushion sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620431176 or 620431176. Listed at 14 retailers as of October 31, 2026, with prices from €945 to €4,538, a €3,593 spread on the same certified stone. Brilliant Earth lists it at €4,538. 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

5.05
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620431176
Dimensions12.28 × 8.34 × 5.75 mm
L/W Ratio1.47
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
12.28 mm8.34 mm5.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620431176
Side View
Table 63.0%Crown 37.7°Girdle: MED-STKPavilion 37.9°Culet: NoneDepth 68.9%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: €4,538 EUR|Low: €945 EUR|High: €4,672 EUR|Avg: €2,006 EUR|-2.9%
Brilliant Earth
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 3€945 EUR
Retailer 12€979 EUR
Retailer 6€1,098 EUR
Retailer 9€1,137 EUR
Retailer 5€1,360 EUR
Retailer 7€1,509 EUR
Retailer 2€1,556 EUR
Retailer 13€1,567 EUR
Retailer 8€1,915 EUR
Retailer 11€1,995 EUR
Retailer 4€3,042 EUR
Retailer 10€3,339 EUR
Brilliant Earth€4,538 EUR

42 data points across 13 retailers

14 retailers€945 EUR to €4,538 EUR

A
Cheapest Retailer
-
€945 EUR
$1,056 USD
Final sale: no returns
Retailer 2
-
€979 EUR
$1,094 USD
View
Price last confirmed 19 days ago
A
Retailer 3
-
€1,098 EUR
£966 GBP
View
A
Retailer 4
-
€1,137 EUR
$1,270 USD
View
B+
Retailer 5
-
€1,360 EUR
$1,519 USD
View
B+
Retailer 6
-
€1,509 EUR
£1,327 GBP
View
B+
Retailer 7
-
€1,556 EUR
View
B+
Retailer 8
-
€1,567 EUR
$1,751 USD
View
B+
Retailer 9
-
€1,915 EUR
$2,140 USD
View
B+
Retailer 10
-
€1,995 EUR
$2,229 USD
View
B
Retailer 11
-
€3,042 EUR
$3,399 USD
View
Retailer 12
-
€3,339 EUR
£2,937 GBP
View
Price last confirmed 10 days ago
B
Retailer 13
-
€3,407 EUR
$3,806 USD
View
Most Expensive
B
Brilliant Earth
9193915A · Oct 31
€4,538 EUR
$5,070 USD
View
13 more retailers have this diamond
Prices start from €945 EURSave up to €3,593 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
5.05ct Cushion
€945 EUR