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Oval|Natural|IGI

1.51ct J SI1 Oval Natural Diamond

EX • J/SI1 • IGI 737519608

Shape and cutting style on the report: Oval brilliant

Certificate IGI 737519608

Diamond specifications and retailer prices

From $3,331 AUD
As of November 6, 2026
Save $2,819 AUD (46%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $7,808 AUD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval 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 737519608. Listed at 9 retailers as of November 2, 2026, with a 85% 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

1.51
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle42.3°
OriginNatural
Grading LabIGI
CertificateIGI 737519608
Dimensions8.93 × 6.51 × 4.13 mm
L/W Ratio1.37
Girdle conditionFaceted
Culet sizePointed
Top View
8.93 mm6.51 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 737519608
Side View
Table 59.0%Crown 36°Girdle: MED-STKPavilion 42.3°Culet: NoneDepth 63.4%

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 6
Current: $3,331 AUD|Low: $3,331 AUD|High: $6,622 AUD|Avg: $4,172 AUD|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 1$3,331 AUD
Retailer 3$3,378 AUD
Retailer 5$3,586 AUD
Retailer 2$3,653 AUD
Retailer 4$6,151 AUD

39 data points across 5 retailers

9 retailers$3,331 AUD to $6,151 AUD

A
Cheapest Retailer
-
$3,331 AUD
A
Retailer 2
-
$3,378 AUD
View
A
Retailer 3
-
$3,653 AUD
View
Retailer 4
-
$3,735 AUD
View
Price last confirmed 45 days ago
Retailer 5
-
$3,735 AUD
View
Price last confirmed 29 days ago
Retailer 6
-
$3,906 AUD
View
Price last confirmed 38 days ago
B+
Retailer 7
-
$6,151 AUD
View
Retailer 8
-
$7,808 AUD
View
Price last confirmed 48 days ago
Most Expensive
NZ Jewellers
5844e52c-594b-41ff-9af7-2932b759b38e · Sep 29
$7,808 AUD
$5,365 USD
View
Price last confirmed 38 days ago
8 more retailers have this diamond
Prices start from $3,331 AUDSave up to $2,819 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 Oval
$3,331 AUD