Round|Natural|IGI

2.51ct I VS1 Round Natural Diamond

EX • I/VS1 • IGI 809692459

Shape and cutting style on the report: Round brilliant

Certificate IGI 809692459

Diamond specifications and retailer prices

From $13,291 USD
As of October 30, 2026
Save $6,437 USD (33%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $20,801 USD at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI 809692459. Listed at 12 retailers as of October 29, 2026, with a 48% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.1°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 809692459
Dimensions8.64 × 8.69 × 5.41 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
8.64 mm8.69 mm2.51 ctI / VS1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 809692459
Side View
Table 58.0%Crown 36.1°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.4%

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: $27,886 USD|Low: $12,660 USD|High: $38,023 USD|Avg: $20,328 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 13$12,660 USD
Retailer 14$12,772 USD
Retailer 12$13,291 USD
Retailer 9$14,215 USD
Retailer 7$15,000 USD
Retailer 2$15,181 USD
Retailer 11$15,399 USD
Retailer 10$17,281 USD
Retailer 8$19,728 USD
Retailer 3$21,727 USD
Retailer 6$23,538 USD
Retailer 5$24,443 USD
NZ Jewellers$27,886 USD
Retailer 4$38,023 USD

30 data points across 14 retailers

12 retailers$13,291 USD to $19,728 USD

Retailer 1
-
$12,660 USD
Price last confirmed 18 days ago
A
Retailer 2
-
$13,291 USD
View
Final sale: no returns
A
Retailer 3
-
$14,215 USD
View
Retailer 4
-
$14,477 USD
View
Price last confirmed 31 days ago
Retailer 5
-
$14,630 USD
View
Price last confirmed 23 days ago
Retailer 6
-
$14,924 USD
View
Price last confirmed 38 days ago
A
Retailer 7
-
$15,000 USD
£11,811 GBP
View
A
Retailer 8
-
$15,181 USD
€14,458 EUR
View
A
Retailer 9
-
$15,399 USD
View
A
Retailer 10
-
$17,281 USD
ZAR 279,175 ZAR
View
A
Retailer 11
-
$19,728 USD
£15,534 GBP
View
Most Expensive
NZ Jewellers
9916dc0b-100a-4668-9c69-5e3a6eabf885 · Sep 20
$20,801 USD
View
Price last confirmed 40 days ago
11 more retailers have this diamond
Prices start from $13,291 USDSave up to $6,437 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
$13,291 USD