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Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6525293492

Certificate GIA 6525293492

Diamond specifications and retailer prices

From $17,464 CAD
As of November 1, 2026
Save $12,488 CAD (42%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $29,952 CAD at MOH London · As of November 4, 2026
View at MOH London

About this 2.51ct natural round diamond

This 2.51ct 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 6525293492. Listed at 15 retailers as of November 1, 2026, with prices from $17,464 to $29,952, a $12,488 spread on the same certified stone. MOH London lists it at $29,952. 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
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6525293492
Dimensions8.67 × 8.62 × 5.41 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
8.67 mm8.62 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6525293492
Side View
Table 55.0%Crown 36°Girdle: MED-STKPavilion 40.6°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 1
Current: $29,952 CAD|Low: $17,464 CAD|High: $30,394 CAD|Avg: $22,541 CAD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6$17,464 CAD
Retailer 7$17,840 CAD
Retailer 4$20,189 CAD
Retailer 8$20,935 CAD
Retailer 2$22,005 CAD
Retailer 5$24,041 CAD
Retailer 3$26,404 CAD
MOH London$29,952 CAD

36 data points across 8 retailers

15 retailers$17,464 CAD to $29,952 CAD

A
Cheapest Retailer
-
$17,464 CAD
A
Retailer 2
-
$17,840 CAD
View
B+
Retailer 3
-
$18,889 CAD
View
Retailer 4
-
$19,230 CAD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$20,189 CAD
View
B+
Retailer 6
-
$20,512 CAD
View
B+
Retailer 7
-
$20,832 CAD
View
B+
Retailer 8
-
$20,935 CAD
View
B+
Retailer 9
-
$21,023 CAD
View
B+
Retailer 10
-
$21,633 CAD
View
B+
Retailer 11
-
$22,005 CAD
View
B
Retailer 12
-
$24,041 CAD
View
B
Retailer 13
-
$26,404 CAD
View
B
Retailer 14
-
$27,242 CAD
View
Most Expensive
B
MOH London
C28A85AE2 · Nov 4
$29,952 CAD
£16,887 GBP
View
14 more retailers have this diamond
Prices start from $17,464 CADSave up to $12,488 CAD

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
$17,464 CAD