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Round|Natural|IGI

1.53ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 642405110

Shape and cutting style on the report: Round brilliant

Certificate IGI 642405110

Diamond specifications and retailer prices

From $5,293 AUD
As of November 7, 2026
Save $4,715 AUD (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $10,639 AUD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.53ct natural round diamond

This 1.53ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 642405110. Listed at 15 retailers as of November 7, 2026, with a 89% 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

1.53
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 642405110
Dimensions7.37 × 7.42 × 4.53 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.37 mm7.42 mm1.53 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 642405110
Side View
Table 61.0%Crown 35°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.2%

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 7
Current: $5,525 AUD|Low: $4,697 AUD|High: $10,333 AUD|Avg: $6,602 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 9$5,293 AUD
Retailer 10$5,410 AUD
Retailer 1$5,525 AUD
Retailer 5$5,618 AUD
Retailer 2$5,635 AUD
Retailer 6$6,171 AUD
Retailer 3$6,396 AUD
Retailer 7$6,795 AUD
Retailer 8$7,344 AUD
Retailer 4$10,009 AUD

30 data points across 10 retailers

15 retailers$5,293 AUD to $10,009 AUD

A
Cheapest Retailer
-
$5,293 AUD
A
Retailer 2
-
$5,410 AUD
View
A
Retailer 3
-
$5,525 AUD
View
A
Retailer 4
-
$5,618 AUD
View
Retailer 5
-
$5,800 AUD
View
Price last confirmed 103 days ago
Retailer 6
-
$6,107 AUD
View
Price last confirmed 45 days ago
A
Retailer 7
-
$6,171 AUD
View
Retailer 8
-
$6,284 AUD
View
Price last confirmed 20 days ago
Retailer 9
-
$6,284 AUD
View
Price last confirmed 22 days ago
A
Retailer 10
-
$6,396 AUD
View
A
Retailer 11
-
$6,795 AUD
View
Retailer 12
-
$7,046 AUD
View
Price last confirmed 46 days ago
A
Retailer 13
-
$7,344 AUD
View
B+
Retailer 14
-
$10,009 AUD
View
Most Expensive
NZ Jewellers
a8833919-68e5-4601-bf50-ec555be2abf0 · Sep 19
$10,639 AUD
$7,310 USD
View
Price last confirmed 48 days ago
14 more retailers have this diamond
Prices start from $5,293 AUDSave up to $4,715 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
1.53ct Round
$5,293 AUD