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Round|Natural|GIA

2.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6555439015

Certificate GIA 6555439015

Diamond specifications and retailer prices

From $17,092 AUD
As of November 6, 2026
Save $9,702 AUD (36%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $26,794 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 2.5ct natural round diamond

This 2.5ct natural 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 GIA 6555439015. Listed at 11 retailers as of November 5, 2026, with prices from $17,092 to $26,794, a $9,702 spread on the same certified stone. NZ Jewellers lists it at $26,794. 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

2.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555439015
Dimensions8.65 × 8.71 × 5.36 mm
L/W Ratio1.01
Culet sizeNone
Top View
8.65 mm8.71 mm2.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555439015
Side View
Table 55.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 61.8%

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: Nov 6
Current: $26,794 AUD|Low: $17,092 AUD|High: $26,794 AUD|Avg: $20,416 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5$17,092 AUD
Retailer 9$17,746 AUD
Retailer 8$17,749 AUD
Retailer 2$18,396 AUD
Retailer 3$18,929 AUD
Retailer 11$19,225 AUD
Retailer 10$19,963 AUD
Retailer 6$20,100 AUD
Retailer 4$22,075 AUD
Retailer 7$25,040 AUD
NZ Jewellers$26,794 AUD

29 data points across 11 retailers

11 retailers$17,092 AUD to $26,794 AUD

A
Cheapest Retailer
-
$17,092 AUD
Retailer 2
-
$17,746 AUD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$17,749 AUD
View
A
Retailer 4
-
$18,396 AUD
View
B+
Retailer 5
-
$18,929 AUD
View
B+
Retailer 6
-
$19,225 AUD
View
B+
Retailer 7
-
$19,963 AUD
View
B+
Retailer 8
-
$20,100 AUD
View
B+
Retailer 9
-
$22,075 AUD
View
B
Retailer 10
-
$25,040 AUD
View
Most Expensive
B
NZ Jewellers
cc57180c-0f92-4f30-aad4-34c218e72643 · Nov 5
$26,794 AUD
$18,757 USD
View
10 more retailers have this diamond
Prices start from $17,092 AUDSave up to $9,702 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
2.50ct Round
$17,092 AUD