Round|Natural|IGI

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • IGI 773617951

Shape and cutting style on the report: Round brilliant

Certificate IGI 773617951

Diamond specifications and retailer prices

From €12,361 EUR
$13,810 USD
As of November 1, 2026
Save €9,282 EUR (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €25,307 EUR at Aurelinne · As of October 21, 2026
View at Aurelinne

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 773617951. Listed at 13 retailers as of November 1, 2026, with a 75% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 773617951
Dimensions8.59 × 8.65 × 5.43 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
8.59 mm8.65 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 773617951
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.9%

Caratlytics Score

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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: €25,307 EUR|Low: €12,361 EUR|High: €31,868 EUR|Avg: €18,031 EUR
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5€12,361 EUR
Retailer 10€12,866 EUR
Retailer 9€13,280 EUR
Retailer 2€14,855 EUR
Retailer 3€16,257 EUR
Retailer 6€19,632 EUR
Retailer 4€21,643 EUR
Retailer 7€23,620 EUR
Retailer 8€24,370 EUR
Aurelinne€25,307 EUR

42 data points across 10 retailers

13 retailers€12,361 EUR to €21,643 EUR

A
Cheapest Retailer
-
€12,361 EUR
$13,810 USD
A
Retailer 2
-
€12,866 EUR
$14,374 USD
View
A
Retailer 3
-
€13,280 EUR
$14,836 USD
View
Final sale: no returns
A
Retailer 4
-
€14,855 EUR
£13,068 GBP
View
A
Retailer 5
-
€15,709 EUR
$17,550 USD
View
A
Retailer 6
-
€15,709 EUR
$17,550 USD
View
B+
Retailer 7
-
€16,237 EUR
$18,140 USD
View
A
Retailer 8
-
€16,257 EUR
View
B+
Retailer 9
-
€19,632 EUR
$21,933 USD
View
B
Retailer 10
-
€21,643 EUR
£19,039 GBP
View
Retailer 11
-
€23,620 EUR
$26,388 USD
View
Price last confirmed 10 days ago
Retailer 12
-
€24,370 EUR
$27,226 USD
View
Price last confirmed 11 days ago
Most Expensive
Aurelinne
7aac21e0-3eb0-4766-9f63-ac646a3e278b · Oct 21
€25,307 EUR
$28,273 USD
View
Price last confirmed 12 days ago
12 more retailers have this diamond
Prices start from €12,361 EURSave up to €9,282 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
€12,361 EUR