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Round|Natural|GIA

2.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5516808668

Certificate GIA 5516808668

Diamond specifications and retailer prices

From $15,409 AUD
As of November 4, 2026
Save $8,498 AUD (36%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $25,333 AUD at NZ Jewellers · As of October 6, 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 5516808668. Listed at 10 retailers as of November 4, 2026, with a 55% 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

2.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5516808668
Dimensions8.60 × 8.53 × 5.39 mm
L/W Ratio1.01
Star length50%
Top View
8.60 mm8.53 mm2.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5516808668
Side View
Table 58.0%Crown 36°GirdlePavilion 40.8°Culet: NoneDepth 62.9%

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: $17,563 AUD|Low: $13,861 AUD|High: $24,099 AUD|Avg: $17,589 AUD|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8$13,861 AUD
Retailer 7$15,409 AUD
Retailer 10$15,425 AUD
Retailer 9$15,578 AUD
Retailer 6$16,466 AUD
Retailer 1$17,563 AUD
Retailer 4$19,189 AUD
Retailer 2$20,829 AUD
Retailer 3$21,075 AUD
Retailer 5$23,907 AUD

23 data points across 10 retailers

10 retailers$15,409 AUD to $23,907 AUD

Retailer 1
-
$13,861 AUD
Price last confirmed 9 days ago
A
Retailer 2
-
$15,409 AUD
View
Retailer 3
-
$16,466 AUD
View
Price last confirmed 29 days ago
Retailer 4
-
$16,719 AUD
View
Price last confirmed 38 days ago
A
Retailer 5
-
$17,563 AUD
View
Retailer 6
-
$18,999 AUD
View
Price last confirmed 33 days ago
B+
Retailer 7
-
$19,189 AUD
View
B+
Retailer 8
-
$21,075 AUD
View
B
Retailer 9
-
$23,907 AUD
View
Most Expensive
NZ Jewellers
054bfbd2-230a-4ad5-b6b0-bc8dae8d540a · Oct 6
$25,333 AUD
$17,734 USD
View
Price last confirmed 31 days ago
9 more retailers have this diamond
Prices start from $15,409 AUDSave up to $8,498 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
$15,409 AUD