CaratHunter
Plans
Cushion|Lab Grown|IGI

4.21ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG804605050

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG804605050

Diamond specifications and retailer prices

From €5,104 EUR
$5,702 USD
As of October 26, 2026
Save €25,848 EUR (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €30,951 EUR at With Clarity · As of October 31, 2026
View at With Clarity

About this 4.21ct lab-grown cushion diamond

This 4.21ct 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 LG804605050 or 804605050. Listed at 21 retailers as of October 26, 2026, with prices from €5,104 to €30,951, a €25,848 spread on the same certified stone. With Clarity lists it at €30,951. 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

4.21
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804605050
Dimensions10.97 × 8.56 × 5.72 mm
L/W Ratio1.28
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
10.97 mm8.56 mm4.21 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804605050
Side View
Table 61.0%Crown 35.5°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 66.8%

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 26
Current: €7,839 EUR|Low: €4,927 EUR|High: €30,364 EUR|Avg: €11,966 EUR|+0.3%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
With Clarity
November 1, 2026
Retailer 15€5,104 EUR
Retailer 5€5,672 EUR
Retailer 3€5,997 EUR
Retailer 4€6,091 EUR
Retailer 2€6,095 EUR
Retailer 6€6,158 EUR
Retailer 12€6,983 EUR
Retailer 1€7,839 EUR
Retailer 11€9,560 EUR
Retailer 17€10,313 EUR
Retailer 14€12,468 EUR
Retailer 13€12,972 EUR
Retailer 16€13,629 EUR
Retailer 7€15,718 EUR
Retailer 8€16,430 EUR
Retailer 9€16,955 EUR
Retailer 18€19,790 EUR
Retailer 10€21,342 EUR
With Clarity€30,364 EUR

40 data points across 19 retailers

21 retailers€5,104 EUR to €30,951 EUR

A
Cheapest Retailer
-
€5,104 EUR
$5,702 USD
A
Retailer 2
-
€5,672 EUR
CA$8,802 CAD
View
A
Retailer 3
-
€5,997 EUR
$6,700 USD
View
A
Retailer 4
-
€6,091 EUR
$6,805 USD
View
Retailer 5
-
€6,095 EUR
$6,809 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
€6,158 EUR
$6,880 USD
View
A
Retailer 7
-
€6,983 EUR
$7,801 USD
View
Final sale: no returns
A
Retailer 8
-
€7,839 EUR
£6,895 GBP
View
B+
Retailer 9
-
€8,676 EUR
£7,632 GBP
View
B+
Retailer 10
-
€9,560 EUR
View
B+
Retailer 11
-
€10,313 EUR
$11,522 USD
View
B+
Retailer 12
-
€12,468 EUR
£10,968 GBP
View
B+
Retailer 13
-
€12,972 EUR
ZAR 234,123 ZAR
View
B
Retailer 14
-
€13,629 EUR
$15,226 USD
View
B
Retailer 15
-
€15,718 EUR
$17,561 USD
View
B
Retailer 16
-
€16,430 EUR
$18,356 USD
View
B
Retailer 17
-
€16,955 EUR
$18,942 USD
View
B
Retailer 18
-
€17,922 EUR
$20,023 USD
View
B
Retailer 19
-
€19,790 EUR
$22,110 USD
View
B
Retailer 20
-
€21,342 EUR
$23,844 USD
View
Most Expensive
B
With Clarity
804605050 · Oct 31
€30,951 EUR
$34,579 USD
View
20 more retailers have this diamond
Prices start from €5,104 EURSave up to €25,848 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
4.21ct Cushion
€5,104 EUR