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Oval|Lab Grown|IGI

2.57ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG836686150

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG836686150

Diamond specifications and retailer prices

From $565 USD
As of October 28, 2026
Save $1,125 USD (67%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,770 USD at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 2.57ct lab-grown oval diamond

This 2.57ct lab-grown oval sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG836686150 or 836686150. Listed at 6 retailers as of October 28, 2026, with a 199% 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

2.57
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836686150
Dimensions11.07 × 7.81 × 4.67 mm
L/W Ratio1.42
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.07 mm7.81 mm2.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836686150
Side View
Table 60.0%Crown 33.9°Girdle: MED-THKPavilion 39.2°Culet: NoneDepth 59.8%

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: $1,770 USD|Low: $565 USD|High: $1,770 USD|Avg: $1,021 USD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 5$565 USD
Retailer 4$675 USD
Retailer 2$752 USD
Retailer 6$836 USD
Retailer 7$1,392 USD
Retailer 3$1,690 USD
Rare Carat$1,770 USD

40 data points across 7 retailers

6 retailers$565 USD to $1,690 USD

B+
Cheapest Retailer
-
$565 USD
A
Retailer 2
-
$752 USD
£592 GBP
View
B+
Retailer 3
-
$836 USD
View
B
Retailer 4
-
$1,392 USD
View
B
Retailer 5
-
$1,690 USD
£1,331 GBP
View
Most Expensive
Rare Carat
1G836686150 · Oct 18
$1,770 USD
View
Price last confirmed 11 days ago
5 more retailers have this diamond
Prices start from $565 USDSave up to $1,125 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
2.57ct Oval
$565 USD