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Round|Natural|GIA

2.50ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 1558779805

Certificate GIA 1558779805

Diamond specifications and retailer prices

From $11,359 AUD
As of November 5, 2026
Save $9,045 AUD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $20,404 AUD at MOH London · As of November 4, 2026
View at MOH London

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1558779805. Listed at 14 retailers as of November 4, 2026, with prices from $11,359 to $20,404, a $9,045 spread on the same certified stone. MOH London lists it at $20,404. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle34.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1558779805
Dimensions8.59 × 8.65 × 5.43 mm
L/W Ratio1.01
Star length45%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Cavity, Indented Natural, Natural
Top View
8.59 mm8.65 mm2.50 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1558779805
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 63.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $20,404 AUD|Low: $11,359 AUD|High: $20,404 AUD|Avg: $14,956 AUD|+6.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$11,359 AUD
Retailer 6$13,416 AUD
Retailer 4$14,092 AUD
Retailer 8$15,265 AUD
Retailer 3$16,028 AUD
Retailer 7$16,266 AUD
Retailer 2$18,608 AUD
MOH London$20,404 AUD

32 data points across 8 retailers

14 retailers$11,359 AUD to $20,404 AUD

A
Cheapest Retailer
-
$11,359 AUD
Retailer 2
-
$12,809 AUD
View
Price last confirmed 25 days ago
B+
Retailer 3
-
$13,416 AUD
View
Retailer 4
-
$13,429 AUD
View
Price last confirmed 29 days ago
A
Retailer 5
-
$14,092 AUD
View
Retailer 6
-
$14,548 AUD
View
Price last confirmed 29 days ago
Retailer 7
-
$15,052 AUD
View
Price last confirmed 38 days ago
A
Retailer 8
-
$15,265 AUD
View
B+
Retailer 9
-
$16,028 AUD
View
B+
Retailer 10
-
$16,266 AUD
View
Retailer 11
-
$16,786 AUD
View
Price last confirmed 33 days ago
B+
Retailer 12
-
$18,608 AUD
View
Retailer 13
-
$20,276 AUD
View
Price last confirmed 34 days ago
Most Expensive
B+
MOH London
CBA3A498F · Nov 4
$20,404 AUD
£11,247 GBP
View
13 more retailers have this diamond
Prices start from $11,359 AUDSave up to $9,045 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
$11,359 AUD