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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 $607 AUD
£336 GBP
As of October 28, 2026
Save $5,357 AUD (90%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,964 AUD 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 $607 to $5,964, a $5,357 spread on the same certified stone. Brilliant Earth lists it at $5,964. 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: $5,964 AUD|Low: $606 AUD|High: $6,505 AUD|Avg: $1,896 AUD|-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$607 AUD
Retailer 3$653 AUD
Retailer 4$713 AUD
Retailer 8$723 AUD
Retailer 13$1,096 AUD
Retailer 14$1,144 AUD
Retailer 2$1,181 AUD
Retailer 12$1,239 AUD
Retailer 5$1,319 AUD
Retailer 6$1,973 AUD
Retailer 10$2,027 AUD
Retailer 9$2,827 AUD
Retailer 11$3,544 AUD
Brilliant Earth$5,964 AUD

36 data points across 14 retailers

17 retailers$607 AUD to $5,964 AUD

A
Cheapest Retailer
-
$607 AUD
£336 GBP
Retailer 2
-
$653 AUD
$459 USD
View
Price last confirmed 32 days ago
Retailer 3
-
$713 AUD
$501 USD
View
Price last confirmed 32 days ago
Retailer 4
-
$723 AUD
$508 USD
View
Price last confirmed 17 days ago
A
Retailer 5
-
$723 AUD
$508 USD
View
A
Retailer 6
-
$1,096 AUD
$770 USD
View
B+
Retailer 7
-
$1,144 AUD
$804 USD
View
A
Retailer 8
-
$1,181 AUD
£653 GBP
View
A
Retailer 9
-
$1,239 AUD
€829 EUR
View
A
Retailer 10
-
$1,319 AUD
$927 USD
View
B+
Retailer 11
-
$1,973 AUD
$1,386 USD
View
B+
Retailer 12
-
$2,027 AUD
$1,424 USD
View
B+
Retailer 13
-
$2,666 AUD
£1,475 GBP
View
B+
Retailer 14
-
$2,827 AUD
£1,564 GBP
View
B
Retailer 15
-
$3,544 AUD
$2,490 USD
View
Retailer 16
-
$3,559 AUD
$2,500 USD
View
Price last confirmed 29 days ago
Most Expensive
B
Brilliant Earth
10979854A · Oct 26
$5,964 AUD
$4,190 USD
View
16 more retailers have this diamond
Prices start from $607 AUDSave up to $5,357 AUD

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
$607 AUD