CaratHunter
Plans
Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2557787831

Certificate GIA 2557787831

Diamond specifications and retailer prices

From €9,442 EUR
As of November 5, 2026
Save €8,645 EUR (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €18,087 EUR 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 €9,442 to €18,087, a €8,645 spread on the same certified stone. NZ Jewellers lists it at €18,087. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: €12,419 EUR|Low: €9,442 EUR|High: €17,130 EUR|Avg: €12,928 EUR|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4€9,442 EUR
Retailer 5€11,388 EUR
Retailer 1€12,419 EUR
Retailer 7€12,778 EUR
Retailer 8€12,978 EUR
Retailer 3€13,032 EUR
Retailer 2€14,902 EUR
Retailer 6€16,903 EUR

29 data points across 8 retailers

15 retailers€9,442 EUR to €18,087 EUR

A
Cheapest Retailer
-
€9,442 EUR
A
Retailer 2
-
€10,981 EUR
View
A
Retailer 3
-
€11,114 EUR
View
A
Retailer 4
-
€11,357 EUR
View
A
Retailer 5
-
€11,388 EUR
View
B+
Retailer 6
-
€11,769 EUR
View
B+
Retailer 7
-
€12,419 EUR
View
B+
Retailer 8
-
€12,778 EUR
View
B+
Retailer 9
-
€12,978 EUR
View
B+
Retailer 10
-
€13,032 EUR
View
B+
Retailer 11
-
€13,298 EUR
View
B+
Retailer 12
-
€13,477 EUR
View
B+
Retailer 13
-
€14,902 EUR
View
B
Retailer 14
-
€16,903 EUR
View
Most Expensive
B
NZ Jewellers
4d6658a7-3260-4822-8dd1-ee7eb8b6e0c0 · Nov 5
€18,087 EUR
$20,301 USD
View
14 more retailers have this diamond
Prices start from €9,442 EURSave up to €8,645 EUR

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
€9,442 EUR