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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 $6,391 NZD
$3,596 USD
As of October 31, 2026
Save $6,261 NZD (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $12,653 NZD at NZ Jewellers · As of November 3, 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 31, 2026, with prices from $6,391 to $12,653, a $6,261 spread on the same certified stone. NZ Jewellers lists it at $12,653. 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: $12,653 NZD|Low: $6,269 NZD|High: $12,910 NZD|Avg: $8,179 NZD|-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 12$6,391 NZD
Retailer 4$6,704 NZD
Retailer 11$6,814 NZD
Retailer 6$7,084 NZD
Retailer 13$7,199 NZD
Retailer 2$7,262 NZD
Retailer 9$7,262 NZD
Retailer 5$7,410 NZD
Retailer 8$7,525 NZD
Retailer 7$8,008 NZD
Retailer 3$8,380 NZD
Retailer 10$12,146 NZD
NZ Jewellers$12,653 NZD

30 data points across 13 retailers

13 retailers$6,391 NZD to $12,653 NZD

A
Cheapest Retailer
-
$6,391 NZD
$3,596 USD
A
Retailer 2
-
$6,704 NZD
$3,772 USD
View
Final sale: no returns
B+
Retailer 3
-
$6,814 NZD
$3,834 USD
View
A
Retailer 4
-
$7,084 NZD
£3,138 GBP
View
B+
Retailer 5
-
$7,199 NZD
$4,051 USD
View
A
Retailer 6
-
$7,262 NZD
$4,086 USD
View
A
Retailer 7
-
$7,262 NZD
$4,086 USD
View
Retailer 8
-
$7,410 NZD
$4,169 USD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
$7,525 NZD
$4,234 USD
View
B+
Retailer 10
-
$8,008 NZD
€4,291 EUR
View
B+
Retailer 11
-
$8,380 NZD
$4,715 USD
View
B+
Retailer 12
-
$12,146 NZD
£5,381 GBP
View
Most Expensive
B+
NZ Jewellers
c6dbeeb5-510e-4935-8301-94ee64fb998d · Nov 3
$12,653 NZD
$7,119 USD
View
12 more retailers have this diamond
Prices start from $6,391 NZDSave up to $6,261 NZD

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
$6,391 NZD