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Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2557787831

Certificate GIA 2557787831

Diamond specifications and retailer prices

From $14,801 CAD
As of November 5, 2026
Save $13,551 CAD (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $28,352 CAD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 2557787831. Listed at 15 retailers as of November 5, 2026, with prices from $14,801 to $28,352, a $13,551 spread on the same certified stone. NZ Jewellers lists it at $28,352. 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
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557787831
Dimensions8.60 × 8.64 × 5.40 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
8.60 mm8.64 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557787831
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.7%

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: $19,467 CAD|Low: $14,801 CAD|High: $26,852 CAD|Avg: $20,265 CAD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4$14,801 CAD
Retailer 5$17,851 CAD
Retailer 1$19,467 CAD
Retailer 7$20,030 CAD
Retailer 8$20,343 CAD
Retailer 3$20,428 CAD
Retailer 2$23,360 CAD
Retailer 6$26,496 CAD

29 data points across 8 retailers

15 retailers$14,801 CAD to $28,352 CAD

A
Cheapest Retailer
-
$14,801 CAD
A
Retailer 2
-
$17,213 CAD
View
A
Retailer 3
-
$17,421 CAD
View
A
Retailer 4
-
$17,802 CAD
View
A
Retailer 5
-
$17,851 CAD
View
B+
Retailer 6
-
$18,449 CAD
View
B+
Retailer 7
-
$19,467 CAD
View
B+
Retailer 8
-
$20,030 CAD
View
B+
Retailer 9
-
$20,343 CAD
View
B+
Retailer 10
-
$20,428 CAD
View
B+
Retailer 11
-
$20,846 CAD
View
B+
Retailer 12
-
$21,125 CAD
View
B+
Retailer 13
-
$23,360 CAD
View
B
Retailer 14
-
$26,496 CAD
View
Most Expensive
B
NZ Jewellers
4d6658a7-3260-4822-8dd1-ee7eb8b6e0c0 · Nov 5
$28,352 CAD
$20,301 USD
View
14 more retailers have this diamond
Prices start from $14,801 CADSave up to $13,551 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
$14,801 CAD