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Oval|Lab Grown|IGI

2.56ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG645404808

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG645404808

Diamond specifications and retailer prices

From $424 AUD
$298 USD
As of October 29, 2026
Save $3,363 AUD (89%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,787 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 2.56ct lab-grown oval diamond

This 2.56ct 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 LG645404808 or 645404808. Listed at 16 retailers as of October 29, 2026, with prices from $424 to $3,787, a $3,363 spread on the same certified stone. Brilliant Earth lists it at $3,787. 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

2.56
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645404808
Dimensions11.08 × 7.78 × 4.82 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
11.08 mm7.78 mm2.56 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645404808
Side View
Table 61.0%Crown 35.4°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.0%

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 29
Current: $3,787 AUD|Low: $407 AUD|High: $4,242 AUD|Avg: $1,265 AUD|-10.7%
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
Retailer 16
October 30, 2026
Retailer 5$424 AUD
Retailer 10$493 AUD
Retailer 15$525 AUD
Retailer 16$525 AUD
Retailer 14$662 AUD
Retailer 3$797 AUD
Retailer 6$860 AUD
Retailer 2$933 AUD
Retailer 13$949 AUD
Retailer 7$1,062 AUD
Retailer 8$1,162 AUD
Retailer 11$1,616 AUD
Retailer 4$1,691 AUD
Retailer 9$2,110 AUD
Retailer 12$2,463 AUD
Brilliant Earth$3,787 AUD

41 data points across 16 retailers

16 retailers$424 AUD to $3,787 AUD

A
Cheapest Retailer
-
$424 AUD
$298 USD
A
Retailer 2
-
$493 AUD
$346 USD
View
A
Retailer 3
-
$525 AUD
$369 USD
View
A
Retailer 4
-
$525 AUD
$369 USD
View
Retailer 5
-
$662 AUD
£366 GBP
View
Price last confirmed 13 days ago
A
Retailer 6
-
$797 AUD
$560 USD
View
B+
Retailer 7
-
$860 AUD
$604 USD
View
A
Retailer 8
-
$933 AUD
£516 GBP
View
A
Retailer 9
-
$949 AUD
€635 EUR
View
B+
Retailer 10
-
$1,062 AUD
$746 USD
View
B+
Retailer 11
-
$1,162 AUD
$816 USD
View
B
Retailer 12
-
$1,616 AUD
$1,135 USD
View
B+
Retailer 13
-
$1,691 AUD
$1,188 USD
View
B
Retailer 14
-
$2,110 AUD
£1,167 GBP
View
B
Retailer 15
-
$2,463 AUD
$1,730 USD
View
Most Expensive
B
Brilliant Earth
11363332A · Oct 29
$3,787 AUD
$2,660 USD
View
15 more retailers have this diamond
Prices start from $424 AUDSave up to $3,363 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
2.56ct Oval
$424 AUD