CaratHunter
Plans
Heart|Lab Grown|IGI

4.21ct D IF Heart Lab Grown Diamond

ID • D/IF • IGI LG846663816

Certificate IGI LG846663816

Diamond specifications and retailer prices

From €5,383 EUR
$6,014 USD
As of October 30, 2026
Save €9,285 EUR (63%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €14,668 EUR at With Clarity · As of October 28, 2026
View at With Clarity

About this 4.21ct lab-grown heart diamond

This 4.21ct lab-grown heart sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846663816 or 846663816. Listed at 4 retailers as of October 28, 2026, with prices from €5,383 to €14,668, a €9,285 spread on the same certified stone. With Clarity lists it at €14,668. 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
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663816
Dimensions9.46 × 10.94 × 6.80 mm
L/W Ratio1.16
Top View
9.46 mm10.94 mm4.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663816
Side View
Table 59.0%CrownGirdlePavilionCulet: NoneDepth 62.2%

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 30
Current: €7,755 EUR|Low: €5,383 EUR|High: €14,668 EUR|Avg: €10,284 EUR
Retailer 1
Retailer 2
Retailer 3
With Clarity
October 29, 2026
Retailer 3€5,383 EUR
Retailer 1€7,755 EUR
Retailer 2€9,464 EUR
With Clarity€14,668 EUR

3 data points across 4 retailers

4 retailers€5,383 EUR to €14,668 EUR

A
Cheapest Retailer
-
€5,383 EUR
$6,014 USD
B+
Retailer 2
-
€7,755 EUR
£6,822 GBP
View
B+
Retailer 3
-
€9,464 EUR
$10,573 USD
View
Most Expensive
B
With Clarity
846663816 · Oct 28
€14,668 EUR
$16,387 USD
View
3 more retailers have this diamond
Prices start from €5,383 EURSave up to €9,285 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 Heart
€5,383 EUR