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 $14,374 USD
As of October 30, 2026
Save $9,806 USD (41%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $28,273 USD 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 October 30, 2026, with a 68% 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
Color
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

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: Oct 30
Current: $28,273 USD|Low: $13,810 USD|High: $35,603 USD|Avg: $20,175 USD
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 5$13,810 USD
Retailer 10$14,374 USD
Retailer 9$14,836 USD
Retailer 4$16,459 USD
Retailer 2$18,163 USD
Retailer 6$21,933 USD
Retailer 3$24,180 USD
Retailer 7$26,388 USD
Retailer 8$27,226 USD
Aurelinne$28,273 USD

42 data points across 10 retailers

13 retailers$14,374 USD to $24,180 USD

Retailer 1
-
$13,810 USD
Price last confirmed 7 days ago
A
Retailer 2
-
$14,374 USD
View
A
Retailer 3
-
$14,836 USD
View
Final sale: no returns
A
Retailer 4
-
$16,459 USD
£12,960 GBP
View
A
Retailer 5
-
$17,550 USD
View
A
Retailer 6
-
$17,550 USD
View
B+
Retailer 7
-
$18,140 USD
View
A
Retailer 8
-
$18,163 USD
€17,298 EUR
View
B+
Retailer 9
-
$21,933 USD
View
B
Retailer 10
-
$24,180 USD
£19,039 GBP
View
Retailer 11
-
$26,388 USD
View
Price last confirmed 10 days ago
Retailer 12
-
$27,226 USD
View
Price last confirmed 10 days ago
Most Expensive
Aurelinne
7aac21e0-3eb0-4766-9f63-ac646a3e278b · Oct 21
$28,273 USD
View
Price last confirmed 11 days ago
12 more retailers have this diamond
Prices start from $14,374 USDSave up to $9,806 USD

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
$14,374 USD