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Radiant|Lab Grown|IGI

4.15ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG628419062

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

Certificate IGI LG628419062

Diamond specifications and retailer prices

From $2,901 NZD
£1,283 GBP
As of October 30, 2026
Save $23,076 NZD (89%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $25,977 NZD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 4.15ct lab-grown radiant diamond

This 4.15ct lab-grown radiant sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG628419062 or 628419062. Listed at 22 retailers as of October 28, 2026, with prices from $2,901 to $25,977, a $23,076 spread on the same certified stone. Brilliant Earth lists it at $25,977. 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

4.15
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.9°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628419062
Dimensions11.37 × 8.12 × 5.22 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.37 mm8.12 mm4.15 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628419062
Side View
Table 60.0%Crown 44.9°Girdle: MediumPavilion 33.4°Culet: NoneDepth 64.3%

Caratlytics Score

How it works →
A+
Exceptional
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 30
Current: $25,977 NZD|Low: $2,901 NZD|High: $25,995 NZD|Avg: $7,133 NZD|-0.1%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 30, 2026
Retailer 2$2,901 NZD
Retailer 5$2,995 NZD
Retailer 6$3,353 NZD
Retailer 13$3,474 NZD
Retailer 3$3,543 NZD
Retailer 11$3,926 NZD
Retailer 12$4,923 NZD
Retailer 8$4,968 NZD
Retailer 10$5,552 NZD
Retailer 16$6,510 NZD
Retailer 9$6,841 NZD
Retailer 19$7,191 NZD
Retailer 14$7,393 NZD
Retailer 4$9,358 NZD
Retailer 18$9,868 NZD
Retailer 15$9,972 NZD
Retailer 17$10,053 NZD
Retailer 7$12,188 NZD
Brilliant Earth$25,977 NZD

21 data points across 19 retailers

22 retailers$2,901 NZD to $25,977 NZD

A+
Cheapest Retailer
-
$2,901 NZD
£1,283 GBP
A
Retailer 2
-
$2,995 NZD
$1,682 USD
View
A
Retailer 3
-
$3,353 NZD
$1,883 USD
View
Final sale: no returns
A
Retailer 4
-
$3,474 NZD
$1,951 USD
View
A
Retailer 5
-
$3,543 NZD
$1,990 USD
View
Retailer 6
-
$3,926 NZD
$2,205 USD
View
Price last confirmed 19 days ago
Retailer 7
-
$4,854 NZD
HK$21,300 HKD
View
Price last confirmed 56 days ago
A
Retailer 8
-
$4,923 NZD
£2,177 GBP
View
A
Retailer 9
-
$4,968 NZD
$2,790 USD
View
A
Retailer 10
-
$5,552 NZD
$3,118 USD
View
A
Retailer 11
-
$6,510 NZD
$3,656 USD
View
A
Retailer 12
-
$6,841 NZD
€3,659 EUR
View
Retailer 13
-
$6,864 NZD
$3,855 USD
View
Price last confirmed 24 days ago
A
Retailer 14
-
$7,191 NZD
£3,180 GBP
View
A
Retailer 15
-
$7,393 NZD
ZAR 67,077 ZAR
View
A
Retailer 16
-
$9,358 NZD
$5,256 USD
View
A
Retailer 17
-
$9,868 NZD
$5,542 USD
View
A
Retailer 18
-
$9,972 NZD
£4,410 GBP
View
A
Retailer 19
-
$10,053 NZD
$5,646 USD
View
Retailer 20
-
$11,716 NZD
$6,580 USD
View
Price last confirmed 31 days ago
A
Retailer 21
-
$12,188 NZD
$6,845 USD
View
Most Expensive
B
Brilliant Earth
14086409A · Oct 28
$25,977 NZD
$14,590 USD
View
21 more retailers have this diamond
Prices start from $2,901 NZDSave up to $23,076 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+
4.15ct Radiant
$2,901 NZD