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2.50ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 670478879

Shape and cutting style on the report: Round brilliant

Certificate IGI 670478879

Diamond specifications and retailer prices

From $21,591 NZD
$12,169 USD
As of October 30, 2026
Save $13,549 NZD (39%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $35,140 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 2.5ct natural round diamond

This 2.5ct natural round sits in the two to three carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670478879. Listed at 13 retailers as of October 30, 2026, with prices from $21,591 to $35,140, a $13,549 spread on the same certified stone. NZ Jewellers lists it at $35,140. 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

2.50
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 670478879
Dimensions8.64 × 8.72 × 5.34 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
8.64 mm8.72 mm2.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670478879
Side View
Table 60.0%Crown 34.1°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 61.5%

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 30
Current: $22,787 NZD|Low: $19,395 NZD|High: $32,881 NZD|Avg: $24,884 NZD|-1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 3$21,320 NZD
Retailer 2$21,591 NZD
Retailer 7$22,303 NZD
Retailer 1$22,787 NZD
Retailer 9$23,273 NZD
Retailer 8$24,824 NZD
Retailer 11$25,213 NZD
Retailer 10$26,182 NZD
Retailer 5$26,568 NZD
Retailer 4$29,154 NZD
Retailer 6$32,662 NZD

41 data points across 11 retailers

13 retailers$21,591 NZD to $35,140 NZD

A
Cheapest Retailer
-
$21,591 NZD
$12,169 USD
B+
Retailer 2
-
$22,303 NZD
$12,570 USD
View
Final sale: no returns
A
Retailer 3
-
$22,787 NZD
£10,113 GBP
View
B+
Retailer 4
-
$22,880 NZD
$12,895 USD
View
B+
Retailer 5
-
$23,273 NZD
$13,117 USD
View
B+
Retailer 6
-
$24,824 NZD
$13,991 USD
View
B+
Retailer 7
-
$25,213 NZD
$14,210 USD
View
B+
Retailer 8
-
$25,835 NZD
$14,560 USD
View
B+
Retailer 9
-
$26,182 NZD
$14,756 USD
View
B+
Retailer 10
-
$26,568 NZD
€14,261 EUR
View
B+
Retailer 11
-
$29,154 NZD
ZAR 265,446 ZAR
View
B
Retailer 12
-
$32,662 NZD
£14,495 GBP
View
Most Expensive
B
NZ Jewellers
d4324a38-5c97-4e14-9532-3d9ceabba2dd · Oct 30
$35,140 NZD
$19,805 USD
View
12 more retailers have this diamond
Prices start from $21,591 NZDSave up to $13,549 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
2.50ct Round
$21,591 NZD