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Round|Natural|IGI

1.30ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 642467910

Shape and cutting style on the report: Round brilliant

Certificate IGI 642467910

Diamond specifications and retailer prices

From $3,278 AUD
As of November 5, 2026
Save $3,123 AUD (49%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $7,658 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 642467910. Listed at 16 retailers as of November 4, 2026, with a 95% 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

1.30
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.1°
Pavilion angle41.3°
OriginNatural
Grading LabIGI
CertificateIGI 642467910
Dimensions6.93 × 7.00 × 4.35 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.93 mm7.00 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 642467910
Side View
Table 58.0%Crown 36.1°Girdle: MediumPavilion 41.3°Culet: NoneDepth 62.4%

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 5
Current: $3,922 AUD|Low: $3,240 AUD|High: $6,494 AUD|Avg: $4,029 AUD|+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 6, 2026
Retailer 5$3,278 AUD
Retailer 9$3,381 AUD
Retailer 8$3,391 AUD
Retailer 2$3,480 AUD
Retailer 11$3,486 AUD
Retailer 10$3,832 AUD
Retailer 3$3,867 AUD
Retailer 1$3,922 AUD
Retailer 4$4,471 AUD
Retailer 6$4,544 AUD
Retailer 7$6,401 AUD

42 data points across 11 retailers

16 retailers$3,278 AUD to $6,401 AUD

A
Cheapest Retailer
-
$3,278 AUD
A
Retailer 2
-
$3,381 AUD
View
Final sale: no returns
A
Retailer 3
-
$3,391 AUD
View
A
Retailer 4
-
$3,480 AUD
View
A
Retailer 5
-
$3,486 AUD
View
Retailer 6
-
$3,663 AUD
View
Price last confirmed 22 days ago
Retailer 7
-
$3,663 AUD
View
Price last confirmed 18 days ago
A
Retailer 8
-
$3,755 AUD
View
Retailer 9
-
$3,832 AUD
View
Price last confirmed 23 days ago
A
Retailer 10
-
$3,867 AUD
View
A
Retailer 11
-
$3,922 AUD
View
Retailer 12
-
$4,226 AUD
View
Price last confirmed 20 days ago
A
Retailer 13
-
$4,471 AUD
View
A
Retailer 14
-
$4,544 AUD
View
B+
Retailer 15
-
$6,401 AUD
View
Most Expensive
NZ Jewellers
0fe13bdb-e031-434a-a5f2-ccaa9d26e219 · Oct 17
$7,658 AUD
$5,262 USD
View
Price last confirmed 20 days ago
15 more retailers have this diamond
Prices start from $3,278 AUDSave up to $3,123 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
1.30ct Round
$3,278 AUD