CaratHunter
Plans
Heart|Lab Grown|IGI

4.21ct D IF Heart Lab Grown Diamond

EX • D/IF • IGI LG762509063

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG762509063

Diamond specifications and retailer prices

From €3,015 EUR
£2,652 GBP
As of October 30, 2026
Save €10,966 EUR (78%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €13,981 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

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 LG762509063 or 762509063. Listed at 21 retailers as of October 30, 2026, with prices from €3,015 to €13,981, a €10,966 spread on the same certified stone. Brilliant Earth lists it at €13,981. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.4°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG762509063
Dimensions9.75 × 10.96 × 6.53 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizePointed
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
9.75 mm10.96 mm4.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG762509063
Side View
Table 61.0%Crown 41.4°Girdle: MED-THKPavilion 39.2°Culet: NoneDepth 59.6%

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: €13,981 EUR|Low: €3,015 EUR|High: €18,707 EUR|Avg: €6,467 EUR|-25.3%
Brilliant Earth
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
Retailer 19
Retailer 20
October 31, 2026
Retailer 13€3,015 EUR
Retailer 7€3,111 EUR
Retailer 5€3,385 EUR
Retailer 4€3,484 EUR
Retailer 18€3,527 EUR
Retailer 15€3,609 EUR
Retailer 12€3,721 EUR
Retailer 16€3,746 EUR
Retailer 9€4,499 EUR
Retailer 19€4,509 EUR
Retailer 2€4,782 EUR
Retailer 8€5,227 EUR
Retailer 20€5,246 EUR
Retailer 14€7,681 EUR
Retailer 17€7,772 EUR
Retailer 10€7,849 EUR
Retailer 11€9,105 EUR
Retailer 6€10,016 EUR
Retailer 3€12,692 EUR
Brilliant Earth€13,981 EUR

27 data points across 20 retailers

21 retailers€3,015 EUR to €13,981 EUR

A
Cheapest Retailer
-
€3,015 EUR
£2,652 GBP
A
Retailer 2
-
€3,111 EUR
$3,476 USD
View
A
Retailer 3
-
€3,385 EUR
$3,782 USD
View
A
Retailer 4
-
€3,484 EUR
$3,892 USD
View
Final sale: no returns
A
Retailer 5
-
€3,527 EUR
$3,940 USD
View
A
Retailer 6
-
€3,609 EUR
$4,032 USD
View
Retailer 7
-
€3,721 EUR
$4,157 USD
View
Price last confirmed 20 days ago
A
Retailer 8
-
€3,746 EUR
$4,185 USD
View
A
Retailer 9
-
€4,499 EUR
$5,026 USD
View
A
Retailer 10
-
€4,509 EUR
$5,038 USD
View
Retailer 11
-
€4,583 EUR
HK$40,000 HKD
View
Price last confirmed 42 days ago
A
Retailer 12
-
€4,782 EUR
£4,207 GBP
View
A
Retailer 13
-
€5,227 EUR
$5,840 USD
View
A
Retailer 14
-
€5,246 EUR
$5,861 USD
View
A
Retailer 15
-
€7,681 EUR
ZAR 138,623 ZAR
View
A
Retailer 16
-
€7,772 EUR
£6,837 GBP
View
Retailer 17
-
€7,849 EUR
A$13,490 AUD
View
Price last confirmed 10 days ago
B+
Retailer 18
-
€9,105 EUR
$10,172 USD
View
B+
Retailer 19
-
€10,016 EUR
$11,190 USD
View
B+
Retailer 20
-
€12,692 EUR
$14,179 USD
View
Most Expensive
B+
Brilliant Earth
18181800A · Oct 31
€13,981 EUR
$15,620 USD
View
20 more retailers have this diamond
Prices start from €3,015 EURSave up to €10,966 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
€3,015 EUR