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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 $804 AUD
$565 USD
As of October 30, 2026
Save $1,602 AUD (67%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,520 AUD 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 29, 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
Colour
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $2,520 AUD|Low: $804 AUD|High: $2,520 AUD|Avg: $1,453 AUD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 5$804 AUD
Retailer 4$961 AUD
Retailer 2$1,071 AUD
Retailer 6$1,190 AUD
Retailer 7$1,982 AUD
Retailer 3$2,406 AUD
Rare Carat$2,520 AUD

40 data points across 7 retailers

6 retailers$804 AUD to $2,406 AUD

B+
Cheapest Retailer
-
$804 AUD
$565 USD
A
Retailer 2
-
$1,071 AUD
£592 GBP
View
B+
Retailer 3
-
$1,190 AUD
$836 USD
View
B
Retailer 4
-
$1,982 AUD
$1,392 USD
View
B
Retailer 5
-
$2,406 AUD
£1,331 GBP
View
Most Expensive
Rare Carat
1G836686150 · Oct 18
$2,520 AUD
$1,770 USD
View
Price last confirmed 12 days ago
5 more retailers have this diamond
Prices start from $804 AUDSave up to $1,602 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
2.57ct Oval
$804 AUD