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Round|Lab Grown|IGI

4.51ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG570363027

Shape and cutting style on the report: Round brilliant

Certificate IGI LG570363027

Diamond specifications and retailer prices

From €3,956 EUR
$4,420 USD
As of November 1, 2026
Save €27,924 EUR (88%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: €31,880 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG570363027 or 570363027. Listed at 23 retailers as of October 31, 2026, with prices from €3,956 to €31,880, a €27,924 spread on the same certified stone. Mervis Diamond Importers lists it at €31,880. 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
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG570363027
Dimensions10.54 × 10.57 × 6.51 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
10.54 mm10.57 mm4.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG570363027
Side View
Table 57.5%Crown 35.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.7%

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: Nov 1
Current: €31,880 EUR|Low: €3,798 EUR|High: €31,880 EUR|Avg: €9,453 EUR
Mervis Diamond Importers
Retailer 2
Retailer 3
Retailer 4
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Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 17€3,956 EUR
Retailer 7€4,146 EUR
Retailer 6€4,407 EUR
Retailer 9€4,431 EUR
Retailer 3€4,589 EUR
Retailer 15€4,592 EUR
Retailer 16€5,972 EUR
Retailer 8€6,013 EUR
Retailer 2€6,427 EUR
Retailer 4€7,101 EUR
Retailer 13€8,623 EUR
Retailer 11€10,308 EUR
Retailer 14€10,782 EUR
Retailer 12€11,114 EUR
Retailer 18€12,254 EUR
Retailer 5€14,515 EUR
Retailer 10€14,876 EUR
Mervis Diamond Importers€31,880 EUR

44 data points across 18 retailers

23 retailers€3,956 EUR to €31,880 EUR

A
Cheapest Retailer
-
€3,956 EUR
$4,420 USD
A
Retailer 2
-
€4,146 EUR
$4,632 USD
View
A
Retailer 3
-
€4,407 EUR
$4,923 USD
View
A
Retailer 4
-
€4,431 EUR
$4,950 USD
View
Final sale: no returns
A
Retailer 5
-
€4,589 EUR
$5,127 USD
View
Retailer 6
-
€4,589 EUR
$5,127 USD
View
Price last confirmed 16 days ago
A
Retailer 7
-
€4,592 EUR
$5,130 USD
View
A
Retailer 8
-
€4,694 EUR
$5,244 USD
View
B+
Retailer 9
-
€5,972 EUR
$6,672 USD
View
B+
Retailer 10
-
€6,013 EUR
$6,718 USD
View
B+
Retailer 11
-
€6,427 EUR
£5,654 GBP
View
B+
Retailer 12
-
€7,101 EUR
$7,933 USD
View
B+
Retailer 13
-
€8,623 EUR
$9,634 USD
View
B+
Retailer 14
-
€10,308 EUR
£9,068 GBP
View
B+
Retailer 15
-
€10,782 EUR
ZAR 194,591 ZAR
View
B+
Retailer 16
-
€11,114 EUR
A$19,103 AUD
View
B
Retailer 17
-
€12,254 EUR
$13,690 USD
View
B
Retailer 18
-
€12,633 EUR
$14,113 USD
View
B
Retailer 19
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€14,515 EUR
$16,217 USD
View
B
Retailer 20
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€14,876 EUR
$16,619 USD
View
B
Retailer 21
-
€18,165 EUR
$20,295 USD
View
B
Retailer 22
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€27,220 EUR
$30,410 USD
View
Most Expensive
B
Mervis Diamond Importers
1985409132 · Oct 31
€31,880 EUR
$35,617 USD
View
22 more retailers have this diamond
Prices start from €3,956 EURSave up to €27,924 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
€3,956 EUR