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Marquise|Natural|IGI

1.51ct J SI1 Marquise Natural Diamond

VG • J/SI1 • IGI 642438037

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 642438037

Diamond specifications and retailer prices

From $5,424 AUD
As of November 6, 2026
Save $6,037 AUD (53%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $11,462 AUD at MOH London · As of November 4, 2026
View at MOH London

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 642438037. Listed at 7 retailers as of November 4, 2026, with prices from $5,424 to $11,462, a $6,037 spread on the same certified stone. MOH London lists it at $11,462. 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 angle33.4°
Pavilion angle38.6°
OriginNatural
Grading LabIGI
CertificateIGI 642438037
Dimensions11.87 × 6.14 × 3.58 mm
L/W Ratio1.93
Girdle conditionFaceted
Top View
11.87 mm6.14 mm1.51 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 642438037
Side View
Table 62.0%Crown 33.4°Girdle: STK-THKPavilion 38.6°Culet: NoneDepth 58.3%

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 6
Current: $11,462 AUD|Low: $5,424 AUD|High: $11,632 AUD|Avg: $7,821 AUD|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 2$5,424 AUD
Retailer 8$6,676 AUD
Retailer 3$6,789 AUD
Retailer 5$6,929 AUD
Retailer 4$7,216 AUD
Retailer 7$7,702 AUD
Retailer 6$8,326 AUD
MOH London$11,462 AUD

44 data points across 8 retailers

7 retailers$5,424 AUD to $11,462 AUD

A
Cheapest Retailer
-
$5,424 AUD
B+
Retailer 2
-
$6,789 AUD
View
B+
Retailer 3
-
$6,929 AUD
View
B+
Retailer 4
-
$7,216 AUD
View
B+
Retailer 5
-
$7,702 AUD
View
B+
Retailer 6
-
$8,326 AUD
View
Most Expensive
B
MOH London
3A37C3C9F · Nov 4
$11,462 AUD
£6,201 GBP
View
6 more retailers have this diamond
Prices start from $5,424 AUDSave up to $6,037 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
$5,424 AUD