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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 $24,503 NZD
$13,810 USD
As of November 1, 2026
Save $18,399 NZD (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $50,165 NZD 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

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 1
Current: $50,165 NZD|Low: $24,503 NZD|High: $63,170 NZD|Avg: $35,742 NZD
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5$24,503 NZD
Retailer 10$25,504 NZD
Retailer 9$26,324 NZD
Retailer 2$29,447 NZD
Retailer 3$32,226 NZD
Retailer 6$38,916 NZD
Retailer 4$42,902 NZD
Retailer 7$46,820 NZD
Retailer 8$48,307 NZD
Aurelinne$50,165 NZD

42 data points across 10 retailers

13 retailers$24,503 NZD to $42,902 NZD

A
Cheapest Retailer
-
$24,503 NZD
$13,810 USD
A
Retailer 2
-
$25,504 NZD
$14,374 USD
View
A
Retailer 3
-
$26,324 NZD
$14,836 USD
View
Final sale: no returns
A
Retailer 4
-
$29,447 NZD
£13,068 GBP
View
A
Retailer 5
-
$31,139 NZD
$17,550 USD
View
A
Retailer 6
-
$31,139 NZD
$17,550 USD
View
B+
Retailer 7
-
$32,186 NZD
$18,140 USD
View
A
Retailer 8
-
$32,226 NZD
€17,298 EUR
View
B+
Retailer 9
-
$38,916 NZD
$21,933 USD
View
B
Retailer 10
-
$42,902 NZD
£19,039 GBP
View
Retailer 11
-
$46,820 NZD
$26,388 USD
View
Price last confirmed 10 days ago
Retailer 12
-
$48,307 NZD
$27,226 USD
View
Price last confirmed 11 days ago
Most Expensive
Aurelinne
7aac21e0-3eb0-4766-9f63-ac646a3e278b · Oct 21
$50,165 NZD
$28,273 USD
View
Price last confirmed 12 days ago
12 more retailers have this diamond
Prices start from $24,503 NZDSave up to $18,399 NZD

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
$24,503 NZD