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Cushion|Lab Grown|IGI

4.59ct H SI1 Cushion Lab Grown Diamond

ID • H/SI1 • IGI LG645499120

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG645499120

Diamond specifications and retailer prices

From €489 EUR
$546 USD
As of October 31, 2026
Save €2,250 EUR (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €2,739 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 4.59ct lab-grown cushion diamond

This 4.59ct lab-grown cushion sits in the three to five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG645499120 or 645499120. Listed at 12 retailers as of October 31, 2026, with prices from €489 to €2,739, a €2,250 spread on the same certified stone. Brilliant Earth lists it at €2,739. 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

4.59
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645499120
Dimensions9.83 × 9.41 × 6.49 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.83 mm9.41 mm4.59 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645499120
Side View
Table 63.0%Crown 43.2°Girdle: MED-THKPavilion 39.1°Culet: NoneDepth 69.0%

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: €2,739 EUR|Low: €489 EUR|High: €2,828 EUR|Avg: €1,349 EUR|-3.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 3€489 EUR
Retailer 10€492 EUR
Retailer 9€636 EUR
Retailer 8€712 EUR
Retailer 5€775 EUR
Retailer 4€1,135 EUR
Retailer 7€1,233 EUR
Retailer 12€1,612 EUR
Retailer 2€1,810 EUR
Retailer 11€1,921 EUR
Retailer 6€2,412 EUR
Brilliant Earth€2,739 EUR

28 data points across 12 retailers

12 retailers€489 EUR to €2,739 EUR

A
Cheapest Retailer
-
€489 EUR
$546 USD
Final sale: no returns
Retailer 2
-
€492 EUR
$550 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
€636 EUR
$710 USD
View
B+
Retailer 4
-
€712 EUR
$795 USD
View
A
Retailer 5
-
€775 EUR
View
B+
Retailer 6
-
€1,233 EUR
$1,377 USD
View
B+
Retailer 7
-
€1,612 EUR
$1,801 USD
View
B+
Retailer 8
-
€1,810 EUR
£1,592 GBP
View
B+
Retailer 9
-
€1,921 EUR
$2,146 USD
View
Retailer 10
-
€2,412 EUR
$2,695 USD
View
Price last confirmed 13 days ago
Retailer 11
-
€2,426 EUR
$2,710 USD
View
Price last confirmed 34 days ago
Most Expensive
B+
Brilliant Earth
16910592A · Oct 31
€2,739 EUR
$3,060 USD
View
11 more retailers have this diamond
Prices start from €489 EURSave up to €2,250 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
4.59ct Cushion
€489 EUR