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Round|Lab Grown|IGI

4.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG712591461

Shape and cutting style on the report: Round brilliant

Certificate IGI LG712591461

Diamond specifications and retailer prices

From €4,162 EUR
£3,661 GBP
As of October 30, 2026
Save €24,660 EUR (86%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: €33,831 EUR at Mervis Diamond Importers · As of October 31, 2026
View at Mervis Diamond Importers

About this 4.51ct lab-grown round diamond

This 4.51ct lab-grown round 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 LG712591461 or 712591461. Listed at 24 retailers as of October 30, 2026, with a 593% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

4.51
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG712591461
Dimensions10.55 × 10.60 × 6.53 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
10.55 mm10.60 mm4.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG712591461
Side View
Table 57.0%Crown 34.1°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.8%

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 30
Current: €33,831 EUR|Low: €4,023 EUR|High: €33,831 EUR|Avg: €10,819 EUR
Mervis Diamond Importers
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
October 31, 2026
Retailer 11€4,162 EUR
Retailer 17€4,190 EUR
Retailer 8€4,641 EUR
Retailer 9€4,692 EUR
Retailer 4€4,860 EUR
Retailer 6€4,860 EUR
Retailer 16€4,892 EUR
Retailer 15€6,207 EUR
Retailer 2€6,839 EUR
Retailer 5€7,516 EUR
Retailer 13€10,974 EUR
Retailer 12€11,418 EUR
Retailer 14€11,815 EUR
Retailer 3€12,302 EUR
Retailer 7€15,393 EUR
Retailer 10€15,879 EUR
Retailer 18€24,006 EUR
Mervis Diamond Importers€33,831 EUR

43 data points across 18 retailers

24 retailers€4,162 EUR to €28,822 EUR

A
Cheapest Retailer
-
€4,162 EUR
£3,661 GBP
A
Retailer 2
-
€4,190 EUR
$4,681 USD
View
A
Retailer 3
-
€4,239 EUR
$4,736 USD
View
A
Retailer 4
-
€4,390 EUR
$4,905 USD
View
A
Retailer 5
-
€4,641 EUR
$5,185 USD
View
A
Retailer 6
-
€4,692 EUR
$5,242 USD
View
Final sale: no returns
Retailer 7
-
€4,860 EUR
$5,430 USD
View
Price last confirmed 15 days ago
A
Retailer 8
-
€4,860 EUR
$5,430 USD
View
A
Retailer 9
-
€4,892 EUR
$5,465 USD
View
B+
Retailer 10
-
€6,207 EUR
$6,934 USD
View
B+
Retailer 11
-
€6,369 EUR
$7,115 USD
View
B+
Retailer 12
-
€6,839 EUR
£6,016 GBP
View
B+
Retailer 13
-
€7,516 EUR
$8,397 USD
View
B+
Retailer 14
-
€10,974 EUR
£9,654 GBP
View
B+
Retailer 15
-
€11,418 EUR
ZAR 206,072 ZAR
View
Retailer 16
-
€11,815 EUR
A$20,308 AUD
View
Price last confirmed 9 days ago
B
Retailer 17
-
€12,302 EUR
$13,744 USD
View
B
Retailer 18
-
€13,378 EUR
$14,946 USD
View
B
Retailer 19
-
€15,393 EUR
$17,197 USD
View
B
Retailer 20
-
€15,879 EUR
$17,741 USD
View
B
Retailer 21
-
€19,195 EUR
$21,444 USD
View
B
Retailer 22
-
€24,006 EUR
$26,820 USD
View
B
Retailer 23
-
€28,822 EUR
$32,200 USD
View
Most Expensive
Mervis Diamond Importers
1985409131 · Oct 31
€33,831 EUR
$37,796 USD
View
Price under review
23 more retailers have this diamond
Prices start from €4,162 EURSave up to €24,660 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
4.51ct Round
€4,162 EUR