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 $735 USD
As of October 29, 2026
Save $4,865 USD (87%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $5,600 USD at Brilliant Earth · As of October 29, 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 29, 2026, with prices from $735 to $5,600, a $4,865 spread on the same certified stone. Brilliant Earth lists it at $5,600. 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
Color
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

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 29
Current: $5,600 USD|Low: $630 USD|High: $8,610 USD|Avg: $1,809 USD|+4.7%
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
Retailer 19
October 29, 2026
Retailer 19$657 USD
Retailer 6$735 USD
Retailer 3$762 USD
Retailer 9$762 USD
Retailer 5$940 USD
Retailer 13$1,025 USD
Retailer 18$1,090 USD
Retailer 8$1,176 USD
Retailer 2$1,218 USD
Retailer 15$1,328 USD
Retailer 16$1,730 USD
Retailer 14$1,768 USD
Retailer 17$1,945 USD
Retailer 7$2,080 USD
Retailer 11$2,362 USD
Retailer 4$2,598 USD
Retailer 10$2,627 USD
Retailer 12$3,226 USD
Brilliant Earth$5,600 USD

33 data points across 19 retailers

21 retailers$735 USD to $5,600 USD

Retailer 1
-
$657 USD
Price last confirmed 21 days ago
Retailer 2
-
$714 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
$735 USD
View
Final sale: no returns
Retailer 4
-
$762 USD
View
Price last confirmed 26 days ago
Retailer 5
-
$762 USD
View
Price last confirmed 17 days ago
A
Retailer 6
-
$940 USD
View
A
Retailer 7
-
$1,025 USD
£807 GBP
View
B+
Retailer 8
-
$1,090 USD
View
A
Retailer 9
-
$1,176 USD
View
A
Retailer 10
-
$1,218 USD
£959 GBP
View
A
Retailer 11
-
$1,328 USD
€1,265 EUR
View
Retailer 12
-
$1,730 USD
A$2,661 AUD
View
Price last confirmed 9 days ago
A
Retailer 13
-
$1,768 USD
ZAR 28,566 ZAR
View
B+
Retailer 14
-
$1,945 USD
View
B+
Retailer 15
-
$2,080 USD
View
Retailer 16
-
$2,141 USD
View
Price last confirmed 29 days ago
B+
Retailer 17
-
$2,362 USD
£1,860 GBP
View
B+
Retailer 18
-
$2,598 USD
View
B+
Retailer 19
-
$2,627 USD
View
B
Retailer 20
-
$3,226 USD
£2,540 GBP
View
Most Expensive
B
Brilliant Earth
20916393A · Oct 29
$5,600 USD
View
20 more retailers have this diamond
Prices start from $735 USDSave up to $4,865 USD

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
$735 USD