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Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5516107542

Certificate GIA 5516107542

Diamond specifications and retailer prices

From €11,034 EUR
As of November 1, 2026
Save €8,370 EUR (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €19,404 EUR at MOH London · As of November 2, 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 5516107542. Listed at 13 retailers as of November 1, 2026, with prices from €11,034 to €19,404, a €8,370 spread on the same certified stone. MOH London lists it at €19,404. 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

2.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5516107542
Dimensions8.71 × 8.67 × 5.41 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
8.71 mm8.67 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5516107542
Side View
Table 56.0%Crown 35.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.3%

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 1
Current: €19,404 EUR|Low: €11,034 EUR|High: €19,637 EUR|Avg: €15,439 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5€11,034 EUR
Retailer 3€13,046 EUR
Retailer 6€13,253 EUR
Retailer 4€15,552 EUR
Retailer 2€17,061 EUR
Retailer 7€17,602 EUR
MOH London€19,404 EUR

43 data points across 7 retailers

13 retailers€11,034 EUR to €19,404 EUR

A
Cheapest Retailer
-
€11,034 EUR
A
Retailer 2
-
€11,527 EUR
View
B+
Retailer 3
-
€12,202 EUR
View
Retailer 4
-
€12,424 EUR
View
Price last confirmed 8 days ago
B+
Retailer 5
-
€12,528 EUR
View
B+
Retailer 6
-
€13,046 EUR
View
B+
Retailer 7
-
€13,253 EUR
View
B+
Retailer 8
-
€13,460 EUR
View
B+
Retailer 9
-
€13,977 EUR
View
B
Retailer 10
-
€15,552 EUR
View
B
Retailer 11
-
€17,061 EUR
View
B
Retailer 12
-
€17,602 EUR
View
Most Expensive
B
MOH London
3665BC12E · Nov 2
€19,404 EUR
£17,149 GBP
View
12 more retailers have this diamond
Prices start from €11,034 EURSave up to €8,370 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
€11,034 EUR