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Marquise|Natural|IGI

1.51ct J SI1 Marquise Natural Diamond

VG • J/SI1 • IGI 809692331

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 809692331

Diamond specifications and retailer prices

From $4,196 AUD
As of November 2, 2026
Save $3,099 AUD (42%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $7,834 AUD at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 809692331. Listed at 8 retailers as of November 2, 2026, with a 74% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle36.5°
OriginNatural
Grading LabIGI
CertificateIGI 809692331
Dimensions11.47 × 6.46 × 3.38 mm
L/W Ratio1.78
Girdle conditionFaceted
Top View
11.47 mm6.46 mm1.51 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 809692331
Side View
Table 70.0%Crown 32.7°Girdle: STK-THKPavilion 36.5°Culet: NoneDepth 52.3%

Caratlytics Score

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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 2
Current: $4,235 AUD|Low: $4,193 AUD|High: $7,610 AUD|Avg: $5,073 AUD|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 4, 2026
Retailer 4$4,193 AUD
Retailer 2$4,196 AUD
Retailer 1$4,235 AUD
Retailer 3$7,294 AUD

31 data points across 4 retailers

8 retailers$4,196 AUD to $7,294 AUD

A
Cheapest Retailer
-
$4,196 AUD
A
Retailer 2
-
$4,235 AUD
View
Retailer 3
-
$4,475 AUD
View
Price last confirmed 30 days ago
Retailer 4
-
$4,497 AUD
View
Price last confirmed 46 days ago
Retailer 5
-
$4,670 AUD
View
Price last confirmed 37 days ago
B+
Retailer 6
-
$7,294 AUD
View
Retailer 7
-
$7,797 AUD
View
Price last confirmed 32 days ago
Most Expensive
NZ Jewellers
6baa2479-edd2-4863-972e-da2ff0d405a2 · Sep 20
$7,834 AUD
$5,383 USD
View
Price last confirmed 47 days ago
7 more retailers have this diamond
Prices start from $4,196 AUDSave up to $3,099 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 Marquise
$4,196 AUD