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Round|Lab Grown|GCAL

2.57ct H SI1 Round Lab Grown Diamond

EX • H/SI1

Diamond specifications and retailer prices

From $571 AUD
As of November 5, 2026
Save $2,713 AUD (83%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,284 AUD at Diamond Exchange Canada · As of November 5, 2026
View at Diamond Exchange Canada

About this 2.57ct lab-grown round diamond

This 2.57ct lab-grown round sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GCAL. Listed at 8 retailers as of November 5, 2026, with prices from $571 to $3,284, a $2,713 spread on the same certified stone. Diamond Exchange Canada lists it at $3,284. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGCAL
Dimensions8.78 × 8.80 × 5.43 mm
L/W Ratio1.00
Top View
8.78 mm8.80 mm2.57 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGCAL
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCuletDepth 61.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,284 AUD|Low: $459 AUD|High: $3,284 AUD|Avg: $1,243 AUD
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 20, 2026
Retailer 6$459 AUD
Retailer 5$561 AUD
Retailer 2$571 AUD
Retailer 3$611 AUD
Retailer 4$2,020 AUD
Diamond Exchange Canada$3,284 AUD

7 data points across 6 retailers

8 retailers$571 AUD to $3,284 AUD

Retailer 1
-
$459 AUD
Price last confirmed 45 days ago
Retailer 2
-
$533 AUD
View
Price last confirmed 44 days ago
Retailer 3
-
$561 AUD
View
Price last confirmed 45 days ago
B+
Retailer 4
-
$571 AUD
View
Retailer 5
-
$611 AUD
View
Price last confirmed 12 days ago
Retailer 6
-
$716 AUD
View
Price last confirmed 52 days ago
Retailer 7
-
$2,020 AUD
View
Price last confirmed 46 days ago
Most Expensive
B+
Diamond Exchange Canada
1986528133 · Nov 5
$3,284 AUD
CA$3,193 CAD
View
7 more retailers have this diamond
Prices start from $571 AUDSave up to $2,713 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.

B+
2.57ct Round
$571 AUD