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Round|Natural|GIA

2.51ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 6555007631

Certificate GIA 6555007631

Diamond specifications and retailer prices

From $6,765 AUD
As of November 4, 2026
Save $8,644 AUD (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $16,783 AUD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555007631. Listed at 15 retailers as of November 4, 2026, with a 128% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

2.51
Carat
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6555007631
Dimensions8.56 × 8.63 × 5.40 mm
L/W Ratio1.01
Top View
8.56 mm8.63 mm2.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555007631
Side View
Table 57.0%CrownGirdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $15,409 AUD|Low: $6,765 AUD|High: $16,783 AUD|Avg: $10,421 AUD|-8.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4$6,765 AUD
Retailer 2$8,810 AUD
Retailer 3$9,214 AUD
Retailer 7$9,214 AUD
Retailer 6$9,658 AUD
Retailer 5$10,172 AUD
NZ Jewellers$15,409 AUD

38 data points across 7 retailers

15 retailers$6,765 AUD to $15,409 AUD

A
Cheapest Retailer
-
$6,765 AUD
A
Retailer 2
-
$8,810 AUD
View
A
Retailer 3
-
$9,214 AUD
View
A
Retailer 4
-
$9,214 AUD
View
Retailer 5
-
$9,350 AUD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$9,658 AUD
View
A
Retailer 7
-
$9,757 AUD
View
Retailer 8
-
$9,761 AUD
View
Price last confirmed 30 days ago
Retailer 9
-
$9,898 AUD
View
Price last confirmed 38 days ago
Retailer 10
-
$10,049 AUD
View
Price last confirmed 38 days ago
A
Retailer 11
-
$10,172 AUD
View
B
Retailer 12
-
$15,409 AUD
View
Retailer 13
-
$15,638 AUD
View
Price last confirmed 10 days ago
Retailer 14
-
$16,325 AUD
View
Price last confirmed 26 days ago
Most Expensive
NZ Jewellers
644459cf-54cd-4e96-a75e-ebeba0d45fb3 · Sep 27
$16,783 AUD
$11,749 USD
View
Price last confirmed 40 days ago
14 more retailers have this diamond
Prices start from $6,765 AUDSave up to $8,644 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
2.51ct Round
$6,765 AUD