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Round|Natural|GIA

2.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6561216159

Certificate GIA 6561216159

Diamond specifications and retailer prices

From $12,267 AUD
As of November 4, 2026
Save $11,181 AUD (48%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $23,447 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 6561216159. Listed at 17 retailers as of November 4, 2026, with prices from $12,267 to $23,447, a $11,181 spread on the same certified stone. NZ Jewellers lists it at $23,447. 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
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6561216159
Dimensions8.61 × 8.66 × 5.41 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Knot, Crystal, Needle
Top View
8.61 mm8.66 mm2.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6561216159
Side View
Table 58.0%Crown 35°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 62.6%

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 4
Current: $16,099 AUD|Low: $12,249 AUD|High: $22,236 AUD|Avg: $16,875 AUD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$12,267 AUD
Retailer 4$15,148 AUD
Retailer 7$16,035 AUD
Retailer 1$16,099 AUD
Retailer 3$16,832 AUD
Retailer 2$19,318 AUD
Retailer 5$21,913 AUD

29 data points across 7 retailers

17 retailers$12,267 AUD to $23,447 AUD

A
Cheapest Retailer
-
$12,267 AUD
A
Retailer 2
-
$14,408 AUD
View
A
Retailer 3
-
$14,772 AUD
View
A
Retailer 4
-
$15,148 AUD
View
A
Retailer 5
-
$15,328 AUD
View
Retailer 6
-
$15,529 AUD
View
Price last confirmed 12 days ago
A
Retailer 7
-
$15,721 AUD
View
A
Retailer 8
-
$16,035 AUD
View
A
Retailer 9
-
$16,099 AUD
View
A
Retailer 10
-
$16,823 AUD
View
A
Retailer 11
-
$16,832 AUD
View
A
Retailer 12
-
$17,082 AUD
View
A
Retailer 13
-
$17,221 AUD
View
B+
Retailer 14
-
$19,318 AUD
View
B+
Retailer 15
-
$19,412 AUD
View
B+
Retailer 16
-
$21,913 AUD
View
Most Expensive
B
NZ Jewellers
d27d4636-6f5d-43e4-a4e7-2bc26c05caff · Nov 5
$23,447 AUD
$16,414 USD
View
16 more retailers have this diamond
Prices start from $12,267 AUDSave up to $11,181 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
$12,267 AUD