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Round|Lab Grown|IGI

4.21ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG627425635

Shape and cutting style on the report: Round brilliant

Certificate IGI LG627425635

Diamond specifications and retailer prices

From €2,008 EUR
$2,252 USD
As of November 1, 2026
Save €6,129 EUR (75%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €8,137 EUR at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 4.21ct lab-grown round diamond

This 4.21ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG627425635 or 627425635. Listed at 21 retailers as of October 31, 2026, with prices from €2,008 to €8,137, a €6,129 spread on the same certified stone. Taylor and Hart lists it at €8,137. 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
F
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG627425635
Dimensions10.29 × 10.33 × 6.40 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS 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
10.29 mm10.33 mm4.21 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG627425635
Side View
Table 57.0%Crown 34.9°Girdle: MediumPavilion 41°Culet: NoneDepth 62.1%

Caratlytics Score

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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: Nov 1
Current: €3,637 EUR|Low: €1,928 EUR|High: €7,775 EUR|Avg: €3,901 EUR|-4.5%
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
November 2, 2026
Retailer 15€2,008 EUR
Retailer 7€2,184 EUR
Retailer 5€2,249 EUR
Retailer 4€2,329 EUR
Retailer 13€2,474 EUR
Retailer 6€2,531 EUR
Retailer 9€3,167 EUR
Retailer 14€3,569 EUR
Retailer 1€3,637 EUR
Retailer 8€3,703 EUR
Retailer 12€4,958 EUR
Retailer 11€4,989 EUR
Retailer 3€5,960 EUR
Retailer 10€6,319 EUR
Retailer 2€7,775 EUR

42 data points across 15 retailers

21 retailers€2,008 EUR to €8,137 EUR

A
Cheapest Retailer
-
€2,008 EUR
$2,252 USD
A
Retailer 2
-
€2,184 EUR
$2,450 USD
View
A
Retailer 3
-
€2,249 EUR
$2,522 USD
View
Final sale: no returns
A
Retailer 4
-
€2,329 EUR
$2,612 USD
View
Retailer 5
-
€2,329 EUR
$2,612 USD
View
Price last confirmed 22 days ago
A
Retailer 6
-
€2,474 EUR
$2,775 USD
View
A
Retailer 7
-
€2,531 EUR
$2,839 USD
View
A
Retailer 8
-
€3,167 EUR
£2,797 GBP
View
A
Retailer 9
-
€3,202 EUR
$3,591 USD
View
A
Retailer 10
-
€3,569 EUR
$4,003 USD
View
A
Retailer 11
-
€3,637 EUR
$4,079 USD
View
A
Retailer 12
-
€3,703 EUR
View
B+
Retailer 13
-
€4,514 EUR
$5,063 USD
View
B+
Retailer 14
-
€4,958 EUR
ZAR 89,829 ZAR
View
B+
Retailer 15
-
€4,989 EUR
A$8,609 AUD
View
B+
Retailer 16
-
€5,960 EUR
$6,685 USD
View
B+
Retailer 17
-
€6,219 EUR
$6,975 USD
View
B+
Retailer 18
-
€6,319 EUR
£5,581 GBP
View
B
Retailer 19
-
€6,625 EUR
$7,431 USD
View
B
Retailer 20
-
€7,775 EUR
$8,720 USD
View
Most Expensive
B
Taylor and Hart
7IG5CD1 · Oct 31
€8,137 EUR
$9,127 USD
View
20 more retailers have this diamond
Prices start from €2,008 EURSave up to €6,129 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 Round
€2,008 EUR