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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 $616 NZD
$347 USD
As of October 24, 2026
Save $4,086 NZD (87%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $4,702 NZD 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 $616 to $4,702, a $4,086 spread on the same certified stone. Brilliant Earth lists it at $4,702. 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: $4,702 NZD|Low: $509 NZD|High: $5,287 NZD|Avg: $1,526 NZD|-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$531 NZD
Retailer 10$616 NZD
Retailer 4$658 NZD
Retailer 15$658 NZD
Retailer 14$828 NZD
Retailer 9$994 NZD
Retailer 5$1,075 NZD
Retailer 2$1,145 NZD
Retailer 12$1,189 NZD
Retailer 3$1,325 NZD
Retailer 13$1,460 NZD
Retailer 11$2,021 NZD
Retailer 6$2,115 NZD
Retailer 8$2,639 NZD
Brilliant Earth$4,702 NZD

33 data points across 15 retailers

14 retailers$616 NZD to $4,702 NZD

Retailer 1
-
$531 NZD
$299 USD
Price last confirmed 8 days ago
A
Retailer 2
-
$616 NZD
$347 USD
View
A
Retailer 3
-
$658 NZD
$371 USD
View
A
Retailer 4
-
$658 NZD
$371 USD
View
Retailer 5
-
$828 NZD
£367 GBP
View
Price last confirmed 14 days ago
A
Retailer 6
-
$994 NZD
$560 USD
View
B+
Retailer 7
-
$1,075 NZD
$606 USD
View
A
Retailer 8
-
$1,145 NZD
£508 GBP
View
A
Retailer 9
-
$1,325 NZD
$747 USD
View
B+
Retailer 10
-
$1,460 NZD
$823 USD
View
B+
Retailer 11
-
$2,021 NZD
$1,139 USD
View
B+
Retailer 12
-
$2,115 NZD
$1,192 USD
View
B
Retailer 13
-
$2,639 NZD
£1,171 GBP
View
Most Expensive
B
Brilliant Earth
9066350A · Oct 26
$4,702 NZD
$2,650 USD
View
13 more retailers have this diamond
Prices start from $616 NZDSave up to $4,086 NZD

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
$616 NZD