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Marquise|Natural|IGI

1.51ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 837697198

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 837697198

Diamond specifications and retailer prices

From $5,131 AUD
$3,596 USD
As of October 31, 2026
Save $5,027 AUD (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $10,158 AUD at NZ Jewellers · As of October 30, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 837697198. Listed at 13 retailers as of October 30, 2026, with prices from $5,131 to $10,158, a $5,027 spread on the same certified stone. NZ Jewellers lists it at $10,158. 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
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.1°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 837697198
Dimensions11.45 × 5.96 × 3.76 mm
L/W Ratio1.92
Girdle conditionFaceted
Top View
11.45 mm5.96 mm1.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 837697198
Side View
Table 61.0%Crown 38.1°Girdle: THK-VTKPavilion 40.3°Culet: NoneDepth 63.1%

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: Oct 31
Current: $10,158 AUD|Low: $5,033 AUD|High: $10,365 AUD|Avg: $6,567 AUD|-2.0%
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
November 2, 2026
Retailer 11$5,131 AUD
Retailer 3$5,382 AUD
Retailer 10$5,471 AUD
Retailer 2$5,687 AUD
Retailer 12$5,780 AUD
Retailer 8$5,830 AUD
Retailer 4$5,949 AUD
Retailer 5$5,949 AUD
Retailer 7$6,041 AUD
Retailer 6$6,429 AUD
Retailer 13$6,728 AUD
Retailer 9$9,751 AUD
NZ Jewellers$10,158 AUD

30 data points across 13 retailers

13 retailers$5,131 AUD to $10,158 AUD

A
Cheapest Retailer
-
$5,131 AUD
$3,596 USD
A
Retailer 2
-
$5,382 AUD
$3,772 USD
View
Final sale: no returns
B+
Retailer 3
-
$5,471 AUD
$3,834 USD
View
A
Retailer 4
-
$5,687 AUD
£3,138 GBP
View
B+
Retailer 5
-
$5,780 AUD
$4,051 USD
View
A
Retailer 6
-
$5,830 AUD
$4,086 USD
View
Retailer 7
-
$5,949 AUD
$4,169 USD
View
Price last confirmed 8 days ago
Retailer 8
-
$5,949 AUD
$4,169 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$6,041 AUD
$4,234 USD
View
B+
Retailer 10
-
$6,429 AUD
€4,291 EUR
View
B+
Retailer 11
-
$6,728 AUD
$4,715 USD
View
B+
Retailer 12
-
$9,751 AUD
£5,381 GBP
View
Most Expensive
B+
NZ Jewellers
c6dbeeb5-510e-4935-8301-94ee64fb998d · Oct 30
$10,158 AUD
$7,119 USD
View
12 more retailers have this diamond
Prices start from $5,131 AUDSave up to $5,027 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
$5,131 AUD