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Round|Lab Grown|IGI

4.01ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG727578514

Shape and cutting style on the report: Round brilliant

Certificate IGI LG727578514

Diamond specifications and retailer prices

From $855 NZD
$482 USD
As of October 26, 2026
Save $3,577 NZD (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,678 NZD at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 4.01ct lab-grown round diamond

This 4.01ct lab-grown round 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 LG727578514 or 727578514. Listed at 17 retailers as of October 26, 2026, with a 418% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

4.01
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG727578514
Dimensions10.29 × 10.26 × 6.20 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.29 mm10.26 mm4.01 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG727578514
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 60.3%

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 26
Current: $5,678 NZD|Low: $681 NZD|High: $5,837 NZD|Avg: $2,198 NZD|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 28, 2026
Retailer 9$855 NZD
Retailer 3$956 NZD
Retailer 4$1,061 NZD
Retailer 10$1,061 NZD
Retailer 2$1,313 NZD
Retailer 11$1,655 NZD
Retailer 5$1,745 NZD
Retailer 12$1,787 NZD
Retailer 7$2,408 NZD
Retailer 8$2,475 NZD
Retailer 6$4,432 NZD
Brilliant Earth$5,678 NZD

38 data points across 12 retailers

17 retailers$855 NZD to $4,432 NZD

A
Cheapest Retailer
-
$855 NZD
$482 USD
Retailer 2
-
$958 NZD
$540 USD
View
Price last confirmed 8 days ago
Retailer 3
-
$1,061 NZD
$598 USD
View
Price last confirmed 7 days ago
Retailer 4
-
$1,061 NZD
$598 USD
View
Price last confirmed 16 days ago
A
Retailer 5
-
$1,313 NZD
$740 USD
View
B+
Retailer 6
-
$1,655 NZD
$933 USD
View
A
Retailer 7
-
$1,745 NZD
£775 GBP
View
A
Retailer 8
-
$1,787 NZD
$1,007 USD
View
B+
Retailer 9
-
$2,181 NZD
$1,229 USD
View
B+
Retailer 10
-
$2,408 NZD
A$2,088 AUD
View
B+
Retailer 11
-
$2,475 NZD
$1,395 USD
View
Retailer 12
-
$2,631 NZD
$1,483 USD
View
Price last confirmed 46 days ago
Retailer 13
-
$3,408 NZD
$1,921 USD
View
Price last confirmed 7 days ago
B
Retailer 14
-
$3,459 NZD
$1,950 USD
View
B
Retailer 15
-
$4,432 NZD
£1,967 GBP
View
Retailer 16
-
$4,468 NZD
$2,518 USD
View
Price last confirmed 97 days ago
Most Expensive
Brilliant Earth
15507358A · Oct 24
$5,678 NZD
$3,200 USD
View
Price last confirmed 7 days ago
16 more retailers have this diamond
Prices start from $855 NZDSave up to $3,577 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
4.01ct Round
$855 NZD