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Radiant|Lab Grown|IGI

4.51ct D SI1 Radiant Lab Grown Diamond

VG • D/SI1 • IGI LG762504880

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG762504880

Diamond specifications and retailer prices

From €518 EUR
$579 USD
As of October 30, 2026
Save €3,912 EUR (88%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €4,431 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 4.51ct lab-grown radiant diamond

This 4.51ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG762504880 or 762504880. Listed at 18 retailers as of October 30, 2026, with prices from €518 to €4,431, a €3,912 spread on the same certified stone. Brilliant Earth lists it at €4,431. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.51
Carat
D
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG762504880
Dimensions11.12 × 7.90 × 5.67 mm
L/W Ratio1.41
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.12 mm7.90 mm4.51 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG762504880
Side View
Table 63.0%Crown 44°Girdle: ThickPavilion 35.6°Culet: NoneDepth 71.8%

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: Oct 30
Current: €4,431 EUR|Low: €504 EUR|High: €6,328 EUR|Avg: €1,486 EUR|-30.0%
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
November 1, 2026
Retailer 15€518 EUR
Retailer 7€580 EUR
Retailer 14€581 EUR
Retailer 2€598 EUR
Retailer 5€643 EUR
Retailer 10€651 EUR
Retailer 6€761 EUR
Retailer 16€861 EUR
Retailer 17€941 EUR
Retailer 12€967 EUR
Retailer 11€1,005 EUR
Retailer 18€1,596 EUR
Retailer 8€1,692 EUR
Retailer 4€1,703 EUR
Retailer 9€2,052 EUR
Retailer 3€2,083 EUR
Retailer 13€2,807 EUR
Brilliant Earth€4,431 EUR

37 data points across 18 retailers

18 retailers€518 EUR to €4,431 EUR

A
Cheapest Retailer
-
€518 EUR
$579 USD
A
Retailer 2
-
€580 EUR
$648 USD
View
Final sale: no returns
A
Retailer 3
-
€581 EUR
$649 USD
View
A
Retailer 4
-
€598 EUR
£526 GBP
View
A
Retailer 5
-
€643 EUR
$718 USD
View
Retailer 6
-
€651 EUR
$727 USD
View
Price last confirmed 15 days ago
A
Retailer 7
-
€761 EUR
$850 USD
View
B+
Retailer 8
-
€861 EUR
$962 USD
View
A
Retailer 9
-
€941 EUR
$1,051 USD
View
A
Retailer 10
-
€967 EUR
View
A
Retailer 11
-
€1,005 EUR
£884 GBP
View
B+
Retailer 12
-
€1,596 EUR
$1,783 USD
View
B+
Retailer 13
-
€1,692 EUR
$1,890 USD
View
B+
Retailer 14
-
€1,703 EUR
$1,903 USD
View
B
Retailer 15
-
€2,052 EUR
$2,293 USD
View
B
Retailer 16
-
€2,083 EUR
$2,327 USD
View
B
Retailer 17
-
€2,807 EUR
£2,469 GBP
View
Most Expensive
B
Brilliant Earth
17330261A · Oct 31
€4,431 EUR
$4,950 USD
View
17 more retailers have this diamond
Prices start from €518 EURSave up to €3,912 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 Radiant
€518 EUR