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Radiant|Lab Grown|IGI

4.07ct E SI1 Radiant Lab Grown Diamond

EX • E/SI1 • IGI LG640439977

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

Certificate IGI LG640439977

Diamond specifications and retailer prices

From $759 NZD
£336 GBP
As of October 28, 2026
Save $6,702 NZD (90%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $7,460 NZD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 4.07ct lab-grown radiant diamond

This 4.07ct lab-grown radiant sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG640439977 or 640439977. Listed at 17 retailers as of October 26, 2026, with prices from $759 to $7,460, a $6,702 spread on the same certified stone. Brilliant Earth lists it at $7,460. 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

4.07
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.3°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640439977
Dimensions11.22 × 7.94 × 5.37 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
11.22 mm7.94 mm4.07 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640439977
Side View
Table 64.0%Crown 41.3°Girdle: MediumPavilion 35.5°Culet: NoneDepth 67.6%

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 28
Current: $7,460 NZD|Low: $759 NZD|High: $8,137 NZD|Avg: $2,371 NZD|-8.3%
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 28, 2026
Retailer 7$759 NZD
Retailer 3$817 NZD
Retailer 4$892 NZD
Retailer 8$904 NZD
Retailer 13$1,371 NZD
Retailer 14$1,432 NZD
Retailer 2$1,478 NZD
Retailer 12$1,550 NZD
Retailer 5$1,651 NZD
Retailer 6$2,468 NZD
Retailer 10$2,535 NZD
Retailer 9$3,537 NZD
Retailer 11$4,433 NZD
Brilliant Earth$7,460 NZD

36 data points across 14 retailers

17 retailers$759 NZD to $7,460 NZD

A
Cheapest Retailer
-
$759 NZD
£336 GBP
Retailer 2
-
$817 NZD
$459 USD
View
Price last confirmed 32 days ago
Retailer 3
-
$892 NZD
$501 USD
View
Price last confirmed 32 days ago
Retailer 4
-
$904 NZD
$508 USD
View
Price last confirmed 18 days ago
A
Retailer 5
-
$904 NZD
$508 USD
View
A
Retailer 6
-
$1,371 NZD
$770 USD
View
B+
Retailer 7
-
$1,432 NZD
$804 USD
View
A
Retailer 8
-
$1,478 NZD
£653 GBP
View
A
Retailer 9
-
$1,550 NZD
€829 EUR
View
A
Retailer 10
-
$1,651 NZD
$927 USD
View
B+
Retailer 11
-
$2,468 NZD
$1,386 USD
View
B+
Retailer 12
-
$2,535 NZD
$1,424 USD
View
B+
Retailer 13
-
$3,334 NZD
£1,475 GBP
View
B+
Retailer 14
-
$3,537 NZD
£1,564 GBP
View
B
Retailer 15
-
$4,433 NZD
$2,490 USD
View
Retailer 16
-
$4,451 NZD
$2,500 USD
View
Price last confirmed 29 days ago
Most Expensive
B
Brilliant Earth
10979854A · Oct 26
$7,460 NZD
$4,190 USD
View
16 more retailers have this diamond
Prices start from $759 NZDSave up to $6,702 NZD

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
4.07ct Radiant
$759 NZD