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Round|Lab Grown|IGI

2.57ct K SI1 Round Lab Grown Diamond

ID • K/SI1 • IGI LG445039408

Shape and cutting style on the report: Round brilliant

Certificate IGI LG445039408

Diamond specifications and retailer prices

From $3,198 AUD
As of November 5, 2026
Save $6,840 AUD (68%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $10,038 AUD at MOH London · As of November 5, 2026
View at MOH London

About this 2.57ct lab-grown round diamond

This 2.57ct lab-grown round sits in the two to three carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG445039408 or 445039408. Listed at 10 retailers as of November 5, 2026, with prices from $3,198 to $10,038, a $6,840 spread on the same certified stone. MOH London lists it at $10,038. 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
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG445039408
Dimensions8.74 × 8.75 × 5.42 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
8.74 mm8.75 mm2.57 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG445039408
Side View
Table 56.5%Crown 35.7°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 61.9%

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: Nov 5
Current: $10,038 AUD|Low: $3,070 AUD|High: $10,201 AUD|Avg: $5,140 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5$3,198 AUD
Retailer 2$3,597 AUD
Retailer 6$3,710 AUD
Retailer 8$3,710 AUD
Retailer 3$3,943 AUD
Retailer 9$4,733 AUD
Retailer 7$5,793 AUD
Retailer 4$5,815 AUD
MOH London$10,038 AUD

40 data points across 9 retailers

10 retailers$3,198 AUD to $10,038 AUD

A
Cheapest Retailer
-
$3,198 AUD
A
Retailer 2
-
$3,480 AUD
View
A
Retailer 3
-
$3,597 AUD
View
Retailer 4
-
$3,710 AUD
View
Price last confirmed 26 days ago
A
Retailer 5
-
$3,710 AUD
View
A
Retailer 6
-
$3,943 AUD
View
B
Retailer 7
-
$5,100 AUD
View
B
Retailer 8
-
$5,793 AUD
View
B
Retailer 9
-
$5,815 AUD
View
Most Expensive
B
MOH London
LG445039408 · Nov 5
$10,038 AUD
£5,533 GBP
View
9 more retailers have this diamond
Prices start from $3,198 AUDSave up to $6,840 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 Round
$3,198 AUD