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2.51ct I IF Round Natural Diamond

EX • I/IF • IGI 821691727

Shape and cutting style on the report: Round brilliant

Certificate IGI 821691727

Diamond specifications and retailer prices

From €18,422 EUR
$20,581 USD
As of October 31, 2026
Save €10,458 EUR (36%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €28,879 EUR at MOH London · As of November 1, 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 I colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI 821691727. Listed at 4 retailers as of October 31, 2026, with prices from €18,422 to €28,879, a €10,458 spread on the same certified stone. MOH London lists it at €28,879. At this carat range, natural pricing varies dramatically across retailers, so the cross-retailer spread on this exact stone is your single best indicator of fair price.

The 4Cs

2.51
Carat
I
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 821691727
Dimensions8.57 × 8.66 × 5.41 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
8.57 mm8.66 mm2.51 ctI / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 821691727
Side View
Table 57.0%Crown 36.6°Girdle: MediumPavilion 40.9°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: Oct 31
Current: €28,879 EUR|Low: €18,220 EUR|High: €29,227 EUR|Avg: €22,271 EUR|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 4€18,422 EUR
Retailer 3€19,198 EUR
Retailer 2€22,338 EUR
MOH London€28,879 EUR

41 data points across 4 retailers

4 retailers€18,422 EUR to €28,879 EUR

A
Cheapest Retailer
-
€18,422 EUR
$20,581 USD
A
Retailer 2
-
€19,198 EUR
£16,888 GBP
View
A
Retailer 3
-
€22,338 EUR
View
Most Expensive
B+
MOH London
2FF6B1E02 · Nov 1
€28,879 EUR
£25,405 GBP
View
3 more retailers have this diamond
Prices start from €18,422 EURSave up to €10,458 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
€18,422 EUR