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Oval|Lab Grown|IGI

4.05ct E IF Oval Lab Grown Diamond

EX • E/IF • IGI LG812620712

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG812620712

Diamond specifications and retailer prices

From $6,456 NZD
£2,855 GBP
As of October 29, 2026
Save $11,082 NZD (63%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $17,538 NZD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 4.05ct lab-grown oval diamond

This 4.05ct lab-grown oval 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 LG812620712 or 812620712. Listed at 11 retailers as of October 28, 2026, with prices from $6,456 to $17,538, a $11,082 spread on the same certified stone. Brilliant Earth lists it at $17,538. 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

4.05
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812620712
Dimensions13.01 × 9.02 × 5.59 mm
L/W Ratio1.44
Girdle conditionFaceted
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
13.01 mm9.02 mm4.05 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812620712
Side View
Table 58.0%Crown 34.6°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.0%

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: $17,538 NZD|Low: $4,994 NZD|High: $18,304 NZD|Avg: $11,381 NZD|-4.2%
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 29, 2026
Retailer 4$4,994 NZD
Retailer 5$6,456 NZD
Retailer 11$7,072 NZD
Retailer 3$7,889 NZD
Retailer 6$9,798 NZD
Retailer 2$10,012 NZD
Retailer 12$11,012 NZD
Retailer 7$11,933 NZD
Retailer 8$12,291 NZD
Retailer 9$12,778 NZD
Retailer 10$16,432 NZD
Brilliant Earth$17,538 NZD

37 data points across 12 retailers

11 retailers$6,456 NZD to $17,538 NZD

Retailer 1
-
$4,994 NZD
$2,805 USD
Price last confirmed 18 days ago
A
Retailer 2
-
$6,456 NZD
£2,855 GBP
View
A
Retailer 3
-
$7,072 NZD
$3,972 USD
View
A
Retailer 4
-
$9,798 NZD
$5,503 USD
View
A
Retailer 5
-
$10,012 NZD
ZAR 90,846 ZAR
View
Retailer 6
-
$11,012 NZD
$6,185 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$11,933 NZD
$6,702 USD
View
B+
Retailer 8
-
$12,291 NZD
$6,903 USD
View
B+
Retailer 9
-
$12,778 NZD
£5,651 GBP
View
B
Retailer 10
-
$16,432 NZD
$9,229 USD
View
Most Expensive
B+
Brilliant Earth
20895956A · Oct 28
$17,538 NZD
$9,850 USD
View
10 more retailers have this diamond
Prices start from $6,456 NZDSave up to $11,082 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
4.05ct Oval
$6,456 NZD