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Oval|Lab Grown|IGI

2.57ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG618405396

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG618405396

Diamond specifications and retailer prices

From $494 AUD
$347 USD
As of October 24, 2026
Save $3,279 AUD (87%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,773 AUD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

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 LG618405396 or 618405396. Listed at 14 retailers as of October 24, 2026, with prices from $494 to $3,773, a $3,279 spread on the same certified stone. Brilliant Earth lists it at $3,773. 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 angle35.9°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618405396
Dimensions10.87 × 7.80 × 4.87 mm
L/W Ratio1.39
Girdle conditionFaceted
Top View
10.87 mm7.80 mm2.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618405396
Side View
Table 61.0%Crown 35.9°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 62.4%

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 24
Current: $3,773 AUD|Low: $409 AUD|High: $4,242 AUD|Avg: $1,230 AUD|-11.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 26, 2026
Retailer 7$426 AUD
Retailer 10$494 AUD
Retailer 4$528 AUD
Retailer 15$528 AUD
Retailer 14$664 AUD
Retailer 9$797 AUD
Retailer 5$863 AUD
Retailer 2$918 AUD
Retailer 12$954 AUD
Retailer 3$1,063 AUD
Retailer 13$1,172 AUD
Retailer 11$1,621 AUD
Retailer 6$1,697 AUD
Retailer 8$2,117 AUD
Brilliant Earth$3,773 AUD

34 data points across 15 retailers

14 retailers$494 AUD to $3,773 AUD

Retailer 1
-
$426 AUD
$299 USD
Price last confirmed 7 days ago
A
Retailer 2
-
$494 AUD
$347 USD
View
A
Retailer 3
-
$528 AUD
$371 USD
View
A
Retailer 4
-
$528 AUD
$371 USD
View
Retailer 5
-
$664 AUD
£367 GBP
View
Price last confirmed 13 days ago
A
Retailer 6
-
$797 AUD
$560 USD
View
B+
Retailer 7
-
$863 AUD
$606 USD
View
A
Retailer 8
-
$918 AUD
£508 GBP
View
A
Retailer 9
-
$1,063 AUD
$747 USD
View
B+
Retailer 10
-
$1,172 AUD
$823 USD
View
B+
Retailer 11
-
$1,621 AUD
$1,139 USD
View
B+
Retailer 12
-
$1,697 AUD
$1,192 USD
View
B
Retailer 13
-
$2,117 AUD
£1,171 GBP
View
Most Expensive
B
Brilliant Earth
9066350A · Oct 26
$3,773 AUD
$2,650 USD
View
13 more retailers have this diamond
Prices start from $494 AUDSave up to $3,279 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
$494 AUD