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Round|Natural|IGI

1.55ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 722558075

Shape and cutting style on the report: Round brilliant

Certificate IGI 722558075

Diamond specifications and retailer prices

From $3,583 AUD
As of November 6, 2026
Save $4,072 AUD (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,997 AUD at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 722558075. Listed at 20 retailers as of November 4, 2026, with a 114% 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

1.55
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41°
OriginNatural
Grading LabIGI
CertificateIGI 722558075
Dimensions7.42 × 7.38 × 4.60 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.42 mm7.38 mm1.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 722558075
Side View
Table 57.0%Crown 35.4°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.1%

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: Nov 6
Current: $3,583 AUD|Low: $3,583 AUD|High: $7,767 AUD|Avg: $5,253 AUD|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 1$3,583 AUD
Retailer 8$4,112 AUD
Retailer 3$4,807 AUD
Retailer 5$5,267 AUD
Retailer 4$5,343 AUD
Retailer 2$5,452 AUD
Retailer 6$5,602 AUD
Retailer 7$7,655 AUD

28 data points across 8 retailers

20 retailers$3,583 AUD to $7,655 AUD

A
Cheapest Retailer
-
$3,583 AUD
A
Retailer 2
-
$4,110 AUD
View
A
Retailer 3
-
$4,112 AUD
View
Retailer 4
-
$4,142 AUD
View
Price last confirmed 95 days ago
A
Retailer 5
-
$4,224 AUD
View
Retailer 6
-
$4,590 AUD
View
Price last confirmed 50 days ago
Retailer 7
-
$4,590 AUD
View
Price last confirmed 29 days ago
Retailer 8
-
$4,590 AUD
View
Price last confirmed 25 days ago
Retailer 9
-
$4,766 AUD
View
Price last confirmed 38 days ago
B+
Retailer 10
-
$4,798 AUD
View
A
Retailer 11
-
$4,807 AUD
View
A
Retailer 12
-
$5,267 AUD
View
Retailer 13
-
$5,296 AUD
View
Price last confirmed 48 days ago
Retailer 14
-
$5,296 AUD
View
Price last confirmed 28 days ago
A
Retailer 15
-
$5,343 AUD
View
A
Retailer 16
-
$5,452 AUD
View
B+
Retailer 17
-
$5,602 AUD
View
B
Retailer 18
-
$7,655 AUD
View
Retailer 19
-
$7,997 AUD
View
Price last confirmed 49 days ago
Most Expensive
NZ Jewellers
753a8e01-ae61-4b72-9041-dc0ad0139ff6 · Sep 26
$7,997 AUD
$5,495 USD
View
Price last confirmed 40 days ago
19 more retailers have this diamond
Prices start from $3,583 AUDSave up to $4,072 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
1.55ct Round
$3,583 AUD