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Marquise|Natural|IGI

0.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • IGI 649481398

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 649481398

Diamond specifications and retailer prices

From $727 NZD
As of November 5, 2026
Save $2,060 NZD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,787 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by IGI 649481398. Listed at 13 retailers as of November 5, 2026, with prices from $727 to $2,787, a $2,060 spread on the same certified stone. NZ Jewellers lists it at $2,787. 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

0.51
Carat
I
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38.2°
Pavilion angle36.7°
OriginNatural
Grading LabIGI
CertificateIGI 649481398
Dimensions9.00 × 4.02 × 2.32 mm
L/W Ratio2.24
Girdle conditionFaceted
Culet sizePointed
Top View
9.00 mm4.02 mm0.51 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 649481398
Side View
Table 64.0%Crown 38.2°Girdle: STK-VTKPavilion 36.7°Culet: NoneDepth 57.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $2,787 NZD|Low: $727 NZD|High: $2,787 NZD|Avg: $1,109 NZD
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
Retailer 14
November 6, 2026
Retailer 3$727 NZD
Retailer 9$758 NZD
Retailer 4$783 NZD
Retailer 10$783 NZD
Retailer 12$794 NZD
Retailer 14$839 NZD
Retailer 2$862 NZD
Retailer 5$961 NZD
Retailer 11$1,008 NZD
Retailer 13$1,016 NZD
Retailer 6$1,091 NZD
Retailer 7$1,308 NZD
Retailer 8$1,676 NZD
NZ Jewellers$2,787 NZD

42 data points across 14 retailers

13 retailers$727 NZD to $2,787 NZD

Retailer 1
-
$727 NZD
Price last confirmed 53 days ago
B+
Retailer 2
-
$727 NZD
View
B+
Retailer 3
-
$758 NZD
View
Retailer 4
-
$783 NZD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$783 NZD
View
B+
Retailer 6
-
$839 NZD
View
B+
Retailer 7
-
$862 NZD
View
B+
Retailer 8
-
$961 NZD
View
B+
Retailer 9
-
$1,008 NZD
View
B+
Retailer 10
-
$1,016 NZD
View
B
Retailer 11
-
$1,308 NZD
View
B
Retailer 12
-
$1,676 NZD
View
Most Expensive
C
NZ Jewellers
dc731d7a-b765-4572-94a9-9777cff5c7f0 · Nov 5
$2,787 NZD
$1,545 USD
View
12 more retailers have this diamond
Prices start from $727 NZDSave up to $2,060 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.

B+
0.51ct Marquise
$727 NZD