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Round|Natural|IGI

2.50ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 627491798

Shape and cutting style on the report: Round brilliant

Certificate IGI 627491798

Diamond specifications and retailer prices

From $17,005 AUD
$11,945 USD
As of October 25, 2026
Save $11,189 AUD (40%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $28,194 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 627491798. Listed at 14 retailers as of October 25, 2026, with prices from $17,005 to $28,194, a $11,189 spread on the same certified stone. NZ Jewellers lists it at $28,194. 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 angle33.3°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 627491798
Dimensions8.69 × 8.65 × 5.34 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
8.69 mm8.65 mm2.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 627491798
Side View
Table 61.0%Crown 33.3°Girdle: MediumPavilion 41.7°Culet: NoneDepth 61.6%

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 25
Current: $18,436 AUD|Low: $15,561 AUD|High: $26,382 AUD|Avg: $19,690 AUD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 7$17,005 AUD
Retailer 3$17,106 AUD
Retailer 9$17,324 AUD
Retailer 8$17,895 AUD
Retailer 1$18,436 AUD
Retailer 2$18,673 AUD
Retailer 10$20,229 AUD
Retailer 11$21,007 AUD
Retailer 4$21,317 AUD
Retailer 6$23,267 AUD
Retailer 5$26,207 AUD

40 data points across 11 retailers

14 retailers$17,005 AUD to $28,194 AUD

A
Cheapest Retailer
-
$17,005 AUD
$11,945 USD
A
Retailer 2
-
$17,324 AUD
$12,169 USD
View
B+
Retailer 3
-
$17,895 AUD
$12,570 USD
View
Final sale: no returns
B+
Retailer 4
-
$18,357 AUD
$12,895 USD
View
A
Retailer 5
-
$18,436 AUD
£10,197 GBP
View
B+
Retailer 6
-
$18,673 AUD
$13,117 USD
View
B+
Retailer 7
-
$19,918 AUD
$13,991 USD
View
B+
Retailer 8
-
$20,229 AUD
$14,210 USD
View
B+
Retailer 9
-
$20,728 AUD
$14,560 USD
View
B+
Retailer 10
-
$21,007 AUD
$14,756 USD
View
B+
Retailer 11
-
$21,317 AUD
€14,261 EUR
View
B+
Retailer 12
-
$23,267 AUD
ZAR 264,035 ZAR
View
B
Retailer 13
-
$26,207 AUD
£14,495 GBP
View
Most Expensive
B
NZ Jewellers
74914770-8ded-41e5-93fc-02570bf561b4 · Oct 30
$28,194 AUD
$19,805 USD
View
13 more retailers have this diamond
Prices start from $17,005 AUDSave up to $11,189 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
$17,005 AUD