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Round|Natural|IGI

2.51ct F SI2 Round Natural Diamond

EX • F/SI2 • IGI 779663033

Shape and cutting style on the report: Round brilliant

Certificate IGI 779663033

Diamond specifications and retailer prices

From $18,162 NZD
SGD 13,809 SGD
As of October 31, 2026
Save $4,602 NZD (20%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $22,828 NZD at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 779663033. Listed at 8 retailers as of October 31, 2026, with a 25% 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
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36.4°
Pavilion angle40.6°
OriginNatural
Grading LabIGI
CertificateIGI 779663033
Dimensions8.56 × 8.60 × 5.41 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
8.56 mm8.60 mm2.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateIGI 779663033
Side View
Table 56.0%Crown 36.4°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 63.1%

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: $21,368 NZD|Low: $18,162 NZD|High: $24,632 NZD|Avg: $20,972 NZD|-3.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
November 1, 2026
Retailer 4$18,162 NZD
Retailer 3$18,280 NZD
Retailer 2$18,548 NZD
Retailer 5$19,035 NZD
Retailer 1$21,368 NZD
Retailer 6$21,371 NZD
Retailer 7$22,764 NZD
Wholesale Diamonds Direct$22,828 NZD

22 data points across 8 retailers

8 retailers$18,162 NZD to $22,764 NZD

A
Cheapest Retailer
-
$18,162 NZD
SGD 13,809 SGD
A
Retailer 2
-
$18,280 NZD
$10,285 USD
View
A
Retailer 3
-
$18,548 NZD
$10,436 USD
View
A
Retailer 4
-
$19,035 NZD
$10,710 USD
View
A
Retailer 5
-
$21,368 NZD
€11,450 EUR
View
A
Retailer 6
-
$21,371 NZD
$12,025 USD
View
B+
Retailer 7
-
$22,764 NZD
$12,808 USD
View
Most Expensive
Wholesale Diamonds Direct
584618837 · Oct 26
$22,828 NZD
$12,844 USD
View
Price last confirmed 7 days ago
7 more retailers have this diamond
Prices start from $18,162 NZDSave up to $4,602 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
$18,162 NZD