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Round|Natural|IGI

2.50ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 766663499

Shape and cutting style on the report: Round brilliant

Certificate IGI 766663499

Diamond specifications and retailer prices

From $11,537 AUD
$8,104 USD
As of October 30, 2026
Save $10,789 AUD (48%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $22,326 AUD 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 766663499. Listed at 14 retailers as of October 30, 2026, with prices from $11,537 to $22,326, a $10,789 spread on the same certified stone. NZ Jewellers lists it at $22,326. 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 angle35.6°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 766663499
Dimensions8.58 × 8.62 × 5.41 mm
L/W Ratio1.00
Girdle conditionPARTLY FACETED
Culet sizePointed
Top View
8.58 mm8.62 mm2.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 766663499
Side View
Table 57.0%Crown 35.6°Girdle: MED-STKPavilion 40.8°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: $22,326 AUD|Low: $11,474 AUD|High: $22,326 AUD|Avg: $14,993 AUD
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
November 1, 2026
Retailer 13$11,537 AUD
Retailer 4$11,637 AUD
Retailer 11$12,236 AUD
Retailer 12$12,321 AUD
Retailer 9$12,543 AUD
Retailer 8$12,844 AUD
Retailer 5$13,349 AUD
Retailer 14$13,554 AUD
Retailer 6$13,645 AUD
Retailer 2$14,522 AUD
Retailer 3$15,402 AUD
Retailer 10$15,435 AUD
Retailer 7$18,604 AUD
NZ Jewellers$22,326 AUD

13 data points across 14 retailers

14 retailers$11,537 AUD to $22,326 AUD

A
Cheapest Retailer
-
$11,537 AUD
$8,104 USD
A
Retailer 2
-
$11,637 AUD
$8,174 USD
View
A
Retailer 3
-
$12,236 AUD
$8,595 USD
View
Retailer 4
-
$12,321 AUD
$8,655 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$12,543 AUD
£6,938 GBP
View
A
Retailer 6
-
$12,844 AUD
£7,104 GBP
View
A
Retailer 7
-
$13,349 AUD
$9,377 USD
View
Retailer 8
-
$13,554 AUD
$9,521 USD
View
Price last confirmed 32 days ago
A
Retailer 9
-
$13,645 AUD
$9,585 USD
View
A
Retailer 10
-
$14,522 AUD
€9,715 EUR
View
B+
Retailer 11
-
$15,402 AUD
$10,819 USD
View
B+
Retailer 12
-
$15,435 AUD
ZAR 175,153 ZAR
View
B+
Retailer 13
-
$18,604 AUD
£10,290 GBP
View
Most Expensive
B
NZ Jewellers
291df81a-f0f8-4dfb-ac9b-ef7703c7734a · Oct 30
$22,326 AUD
$15,683 USD
View
13 more retailers have this diamond
Prices start from $11,537 AUDSave up to $10,789 AUD

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
$11,537 AUD