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Cushion|Lab Grown|IGI

4.23ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG826639385

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG826639385

Diamond specifications and retailer prices

From €5,128 EUR
$5,729 USD
As of October 31, 2026
Save €25,970 EUR (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €31,098 EUR at With Clarity · As of October 31, 2026
View at With Clarity

About this 4.23ct lab-grown cushion diamond

This 4.23ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG826639385 or 826639385. Listed at 20 retailers as of October 31, 2026, with prices from €5,128 to €31,098, a €25,970 spread on the same certified stone. With Clarity lists it at €31,098. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.23
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG826639385
Dimensions10.83 × 8.60 × 5.67 mm
L/W Ratio1.26
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.83 mm8.60 mm4.23 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG826639385
Side View
Table 62.0%Crown 35°Girdle: STK-THKPavilion 38.7°Culet: NoneDepth 65.9%

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: €9,605 EUR|Low: €4,951 EUR|High: €19,889 EUR|Avg: €10,240 EUR|+2.3%
Retailer 1
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 10€5,128 EUR
Retailer 5€6,045 EUR
Retailer 2€6,122 EUR
Retailer 6€7,016 EUR
Retailer 7€7,667 EUR
Retailer 3€8,717 EUR
Retailer 1€9,605 EUR
Retailer 12€10,363 EUR
Retailer 9€12,525 EUR
Retailer 8€13,031 EUR
Retailer 11€13,693 EUR
Retailer 4€15,793 EUR
Retailer 13€19,889 EUR

42 data points across 13 retailers

20 retailers€5,128 EUR to €31,098 EUR

A
Cheapest Retailer
-
€5,128 EUR
$5,729 USD
A
Retailer 2
-
€5,700 EUR
CA$8,844 CAD
View
A
Retailer 3
-
€6,045 EUR
$6,754 USD
View
A
Retailer 4
-
€6,118 EUR
$6,835 USD
View
Retailer 5
-
€6,122 EUR
$6,840 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
€7,016 EUR
$7,838 USD
View
Final sale: no returns
A
Retailer 7
-
€7,667 EUR
£6,744 GBP
View
B+
Retailer 8
-
€8,717 EUR
£7,668 GBP
View
B+
Retailer 9
-
€9,605 EUR
View
B+
Retailer 10
-
€10,363 EUR
$11,578 USD
View
B+
Retailer 11
-
€12,525 EUR
£11,018 GBP
View
B+
Retailer 12
-
€13,031 EUR
ZAR 235,196 ZAR
View
B
Retailer 13
-
€13,693 EUR
$15,298 USD
View
B
Retailer 14
-
€15,793 EUR
$17,644 USD
View
B
Retailer 15
-
€16,508 EUR
$18,443 USD
View
B
Retailer 16
-
€17,033 EUR
$19,029 USD
View
B
Retailer 17
-
€18,008 EUR
$20,119 USD
View
B
Retailer 18
-
€19,889 EUR
$22,220 USD
View
B
Retailer 19
-
€21,424 EUR
$23,935 USD
View
Most Expensive
B
With Clarity
826639385 · Oct 31
€31,098 EUR
$34,743 USD
View
19 more retailers have this diamond
Prices start from €5,128 EURSave up to €25,970 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
4.23ct Cushion
€5,128 EUR