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Oval|Lab Grown|IGI

4.05ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG837666898

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG837666898

Diamond specifications and retailer prices

From $1,051 AUD
$738 USD
As of October 30, 2026
Save $1,842 AUD (64%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $3,531 AUD at Rare Carat · As of October 18, 2026
View at Rare Carat

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG837666898 or 837666898. Listed at 7 retailers as of October 29, 2026, with a 175% 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

4.05
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837666898
Dimensions13.72 × 8.55 × 5.37 mm
L/W Ratio1.60
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.72 mm8.55 mm4.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837666898
Side View
Table 63.0%Crown 32.7°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
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 30
Current: $3,531 AUD|Low: $1,051 AUD|High: $3,531 AUD|Avg: $2,061 AUD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 5$1,051 AUD
Retailer 2$1,229 AUD
Retailer 3$1,295 AUD
Retailer 6$1,973 AUD
Retailer 7$2,565 AUD
Retailer 4$2,893 AUD
Rare Carat$3,531 AUD

17 data points across 7 retailers

7 retailers$1,051 AUD to $2,893 AUD

B+
Cheapest Retailer
-
$1,051 AUD
$738 USD
A
Retailer 2
-
$1,229 AUD
€822 EUR
View
A
Retailer 3
-
$1,295 AUD
£716 GBP
View
B+
Retailer 4
-
$1,973 AUD
$1,386 USD
View
B+
Retailer 5
-
$2,565 AUD
$1,801 USD
View
B
Retailer 6
-
$2,893 AUD
£1,600 GBP
View
Most Expensive
Rare Carat
42A837666898 · Oct 18
$3,531 AUD
$2,480 USD
View
Price last confirmed 12 days ago
6 more retailers have this diamond
Prices start from $1,051 AUDSave up to $1,842 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
4.05ct Oval
$1,051 AUD