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Round|Natural|IGI

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 713545321

Shape and cutting style on the report: Round brilliant

Certificate IGI 713545321

Diamond specifications and retailer prices

From $3,652 AUD
$2,565 USD
As of November 1, 2026
Save $4,870 AUD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,522 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct 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 713545321. Listed at 20 retailers as of October 30, 2026, with prices from $3,652 to $8,522, a $4,870 spread on the same certified stone. NZ Jewellers lists it at $8,522. 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

1.51
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.6°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 713545321
Dimensions7.30 × 7.18 × 4.59 mm
L/W Ratio1.02
Girdle conditionPARTLY FACETED
Culet sizePointed
Top View
7.30 mm7.18 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 713545321
Side View
Table 57.0%Crown 36.6°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.2%

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: Nov 1
Current: $8,522 AUD|Low: $3,448 AUD|High: $8,522 AUD|Avg: $4,867 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
Retailer 15
November 2, 2026
Retailer 15$3,652 AUD
Retailer 14$3,761 AUD
Retailer 5$3,783 AUD
Retailer 3$3,993 AUD
Retailer 7$4,076 AUD
Retailer 4$4,232 AUD
Retailer 8$4,410 AUD
Retailer 13$4,472 AUD
Retailer 6$4,704 AUD
Retailer 9$4,750 AUD
Retailer 12$4,764 AUD
Retailer 2$4,868 AUD
Retailer 11$5,010 AUD
Retailer 10$6,816 AUD
NZ Jewellers$8,522 AUD

39 data points across 15 retailers

20 retailers$3,652 AUD to $8,522 AUD

A
Cheapest Retailer
-
$3,652 AUD
$2,565 USD
A
Retailer 2
-
$3,761 AUD
$2,642 USD
View
Final sale: no returns
A
Retailer 3
-
$3,783 AUD
$2,657 USD
View
Retailer 4
-
$3,885 AUD
$2,729 USD
View
Price last confirmed 84 days ago
A
Retailer 5
-
$3,993 AUD
$2,805 USD
View
Retailer 6
-
$4,076 AUD
$2,863 USD
View
Price last confirmed 37 days ago
A
Retailer 7
-
$4,076 AUD
$2,863 USD
View
A
Retailer 8
-
$4,232 AUD
$2,973 USD
View
A
Retailer 9
-
$4,278 AUD
$3,005 USD
View
A
Retailer 10
-
$4,410 AUD
£2,439 GBP
View
B+
Retailer 11
-
$4,472 AUD
$3,141 USD
View
B+
Retailer 12
-
$4,704 AUD
$3,304 USD
View
Retailer 13
-
$4,704 AUD
$3,304 USD
View
Price last confirmed 41 days ago
A
Retailer 14
-
$4,750 AUD
€3,178 EUR
View
B+
Retailer 15
-
$4,764 AUD
£2,635 GBP
View
A
Retailer 16
-
$4,868 AUD
£2,693 GBP
View
A
Retailer 17
-
$5,010 AUD
ZAR 56,858 ZAR
View
B+
Retailer 18
-
$6,816 AUD
£3,770 GBP
View
Retailer 19
-
$8,522 AUD
$5,986 USD
View
Price last confirmed 37 days ago
Most Expensive
B
NZ Jewellers
d4139d59-90a1-44fe-8074-bf5e2509c708 · Oct 30
$8,522 AUD
$5,986 USD
View
19 more retailers have this diamond
Prices start from $3,652 AUDSave up to $4,870 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
1.51ct Round
$3,652 AUD