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 $738 USD
As of October 28, 2026
Save $1,294 USD (64%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,480 USD 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 6 retailers as of October 28, 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $2,480 USD|Low: $738 USD|High: $2,480 USD|Avg: $1,447 USD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 4$738 USD
Retailer 7$899 USD
Retailer 2$909 USD
Retailer 5$1,386 USD
Retailer 6$1,801 USD
Retailer 3$2,032 USD
Rare Carat$2,480 USD

16 data points across 7 retailers

6 retailers$738 USD to $2,032 USD

B+
Cheapest Retailer
-
$738 USD
A
Retailer 2
-
$909 USD
£716 GBP
View
B+
Retailer 3
-
$1,386 USD
View
B+
Retailer 4
-
$1,801 USD
View
B
Retailer 5
-
$2,032 USD
£1,600 GBP
View
Most Expensive
Rare Carat
42A837666898 · Oct 18
$2,480 USD
View
Price last confirmed 11 days ago
5 more retailers have this diamond
Prices start from $738 USDSave up to $1,294 USD

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
$738 USD