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Marquise|Natural|IGI

1.51ct K SI2 Marquise Natural Diamond

VG • K/SI2 • IGI 778617511

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 778617511

Diamond specifications and retailer prices

From $3,954 NZD
As of November 6, 2026
Save $4,771 NZD (55%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,939 NZD at NZ Jewellers · As of September 25, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 778617511. Listed at 12 retailers as of November 4, 2026, with a 121% 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
K
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle39.8°
OriginNatural
Grading LabIGI
CertificateIGI 778617511
Dimensions11.41 × 6.00 × 3.79 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizePointed
Top View
11.41 mm6.00 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 778617511
Side View
Table 58.0%Crown 34.4°Girdle: STK-THKPavilion 39.8°Culet: NoneDepth 63.2%

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: $3,954 NZD|Low: $3,954 NZD|High: $8,855 NZD|Avg: $5,633 NZD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$3,954 NZD
Retailer 5$4,687 NZD
Retailer 8$5,000 NZD
Retailer 6$5,038 NZD
Retailer 9$5,487 NZD
Retailer 4$5,511 NZD
Retailer 7$5,989 NZD
Retailer 2$6,106 NZD
Retailer 3$8,725 NZD

45 data points across 9 retailers

12 retailers$3,954 NZD to $8,725 NZD

A
Cheapest Retailer
-
$3,954 NZD
B+
Retailer 2
-
$4,687 NZD
View
B+
Retailer 3
-
$5,000 NZD
View
B+
Retailer 4
-
$5,038 NZD
View
Retailer 5
-
$5,233 NZD
View
Price last confirmed 46 days ago
B+
Retailer 6
-
$5,487 NZD
View
B+
Retailer 7
-
$5,511 NZD
View
Retailer 8
-
$5,989 NZD
View
Price last confirmed 39 days ago
Retailer 9
-
$6,038 NZD
View
Price last confirmed 44 days ago
B+
Retailer 10
-
$6,106 NZD
View
B+
Retailer 11
-
$8,725 NZD
View
Most Expensive
NZ Jewellers
701d311b-83a9-45db-83f6-f060870e8830 · Sep 25
$10,939 NZD
$6,064 USD
View
Price last confirmed 42 days ago
11 more retailers have this diamond
Prices start from $3,954 NZDSave up to $4,771 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
$3,954 NZD