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Radiant|Lab Grown|IGI

3.91ct D VS1 Radiant Lab Grown Diamond

EX • D/VS1 • IGI LG819641021

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

Certificate IGI LG819641021

Diamond specifications and retailer prices

From €658 EUR
$735 USD
As of October 31, 2026
Save €3,934 EUR (86%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €4,592 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.91ct lab-grown radiant diamond

This 3.91ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG819641021 or 819641021. Listed at 21 retailers as of October 31, 2026, with prices from €658 to €4,592, a €3,934 spread on the same certified stone. Brilliant Earth lists it at €4,592. 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

3.91
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819641021
Dimensions11.25 × 7.76 × 4.90 mm
L/W Ratio1.45
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.25 mm7.76 mm3.91 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819641021
Side View
Table 63.0%Crown 44.1°Girdle: STK-THKPavilion 37.4°Culet: NoneDepth 63.1%

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 31
Current: €4,592 EUR|Low: €564 EUR|High: €7,707 EUR|Avg: €1,607 EUR|-4.1%
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
November 1, 2026
Retailer 15€588 EUR
Retailer 6€658 EUR
Retailer 3€682 EUR
Retailer 5€841 EUR
Retailer 10€915 EUR
Retailer 14€976 EUR
Retailer 2€1,090 EUR
Retailer 8€1,193 EUR
Retailer 9€1,539 EUR
Retailer 12€1,583 EUR
Retailer 13€1,741 EUR
Retailer 7€1,862 EUR
Retailer 4€2,325 EUR
Retailer 11€2,887 EUR
Brilliant Earth€4,592 EUR

34 data points across 15 retailers

21 retailers€658 EUR to €4,592 EUR

Retailer 1
-
€588 EUR
$657 USD
Price last confirmed 23 days ago
Retailer 2
-
€639 EUR
$714 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
€658 EUR
$735 USD
View
Final sale: no returns
Retailer 4
-
€682 EUR
$762 USD
View
Price last confirmed 28 days ago
Retailer 5
-
€682 EUR
$762 USD
View
Price last confirmed 19 days ago
A
Retailer 6
-
€841 EUR
$940 USD
View
A
Retailer 7
-
€915 EUR
£805 GBP
View
B+
Retailer 8
-
€976 EUR
$1,090 USD
View
A
Retailer 9
-
€1,053 EUR
$1,176 USD
View
A
Retailer 10
-
€1,090 EUR
£959 GBP
View
A
Retailer 11
-
€1,193 EUR
View
A
Retailer 12
-
€1,539 EUR
A$2,646 AUD
View
A
Retailer 13
-
€1,583 EUR
ZAR 28,566 ZAR
View
B+
Retailer 14
-
€1,741 EUR
$1,945 USD
View
B+
Retailer 15
-
€1,862 EUR
$2,080 USD
View
Retailer 16
-
€1,916 EUR
$2,141 USD
View
Price last confirmed 31 days ago
B+
Retailer 17
-
€2,114 EUR
£1,860 GBP
View
B+
Retailer 18
-
€2,325 EUR
$2,598 USD
View
B+
Retailer 19
-
€2,352 EUR
$2,627 USD
View
B
Retailer 20
-
€2,887 EUR
£2,540 GBP
View
Most Expensive
B
Brilliant Earth
20916393A · Oct 31
€4,592 EUR
$5,130 USD
View
20 more retailers have this diamond
Prices start from €658 EURSave up to €3,934 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
3.91ct Radiant
€658 EUR