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Oval|Lab Grown|IGI

1.00ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG818629939

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG818629939

Diamond specifications and retailer prices

From $590 USD
As of October 29, 2026
2 retailers carry this diamond
Most expensive: $590 USD at Brilliant Earth
View at Brilliant Earth

About this 1ct lab-grown oval diamond

This 1ct lab-grown oval sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818629939 or 818629939. Listed at 2 retailers as of October 29, 2026. 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

1.00
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818629939
Dimensions7.79 × 5.56 × 3.63 mm
L/W Ratio1.40
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
7.79 mm5.56 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818629939
Side View
Table 60.0%Crown 37.7°Girdle: STK-THKPavilion 41.1°Culet: NoneDepth 65.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 29
Current: $590 USD|Low: $90 USD|High: $1,023 USD|Avg: $434 USD|-37.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
September 7, 2026
Retailer 10$90 USD
Retailer 5$116 USD
Retailer 8$287 USD
Retailer 2$300 USD
Retailer 9$310 USD
Retailer 7$429 USD
Retailer 3$558 USD
Brilliant Earth$590 USD
Retailer 6$639 USD
Retailer 4$1,023 USD

13 data points across 10 retailers

2 retailers

B+
Retailer 1
-
$429 USD
Price last confirmed 59 days ago
Most Expensive
B
Brilliant Earth
21141103A · Oct 29
$590 USD
View
1 more retailer has this diamond

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.

B+
1.00ct Oval
$590 USD