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Radiant|Lab Grown|IGI

4.05ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG634405415

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

Certificate IGI LG634405415

Diamond specifications and retailer prices

From €669 EUR
$747 USD
As of October 30, 2026
Save €5,051 EUR (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €5,720 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 4.05ct lab-grown radiant diamond

This 4.05ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG634405415 or 634405415. Listed at 15 retailers as of October 30, 2026, with prices from €669 to €5,720, a €5,051 spread on the same certified stone. Brilliant Earth lists it at €5,720. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

4.05
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle30°
OriginLab Grown
Grading LabIGI
CertificateIGI LG634405415
Dimensions10.93 × 7.94 × 5.04 mm
L/W Ratio1.38
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
10.93 mm7.94 mm4.05 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG634405415
Side View
Table 66.0%Crown 38.5°Girdle: MED-STKPavilion 30°Culet: NoneDepth 63.5%

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: €5,720 EUR|Low: €642 EUR|High: €5,720 EUR|Avg: €1,472 EUR
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
October 31, 2026
Retailer 11€669 EUR
Retailer 3€728 EUR
Retailer 6€748 EUR
Retailer 7€773 EUR
Retailer 4€775 EUR
Retailer 12€775 EUR
Retailer 9€935 EUR
Retailer 5€1,079 EUR
Retailer 2€1,245 EUR
Retailer 14€1,257 EUR
Retailer 10€1,910 EUR
Retailer 13€2,180 EUR
Retailer 8€3,061 EUR
Brilliant Earth€5,720 EUR

43 data points across 14 retailers

15 retailers€669 EUR to €5,720 EUR

A
Cheapest Retailer
-
€669 EUR
$747 USD
A
Retailer 2
-
€728 EUR
$813 USD
View
A
Retailer 3
-
€748 EUR
$836 USD
View
Final sale: no returns
A
Retailer 4
-
€773 EUR
£680 GBP
View
A
Retailer 5
-
€775 EUR
$866 USD
View
Retailer 6
-
€775 EUR
$866 USD
View
Price last confirmed 19 days ago
A
Retailer 7
-
€935 EUR
$1,045 USD
View
B+
Retailer 8
-
€1,079 EUR
$1,205 USD
View
B+
Retailer 9
-
€1,245 EUR
£1,095 GBP
View
B+
Retailer 10
-
€1,257 EUR
$1,404 USD
View
B
Retailer 11
-
€1,910 EUR
$2,134 USD
View
B
Retailer 12
-
€2,180 EUR
$2,436 USD
View
B
Retailer 13
-
€3,061 EUR
£2,693 GBP
View
B
Retailer 14
-
€3,414 EUR
HK$29,800 HKD
View
Most Expensive
B
Brilliant Earth
17976490A · Oct 31
€5,720 EUR
$6,390 USD
View
14 more retailers have this diamond
Prices start from €669 EURSave up to €5,051 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
4.05ct Radiant
€669 EUR