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Marquise|Natural|IGI

0.51ct G SI2 Marquise Natural Diamond

VG • G/SI2 • IGI 815681717

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 815681717

Diamond specifications and retailer prices

From $668 NZD
₹35,798 INR
As of October 27, 2026
Save $2,671 NZD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,340 NZD at NZ Jewellers · As of October 27, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 815681717. Listed at 12 retailers as of October 27, 2026, with prices from $668 to $3,340, a $2,671 spread on the same certified stone. NZ Jewellers lists it at $3,340. 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
G
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.6°
Pavilion angle34.8°
OriginNatural
Grading LabIGI
CertificateIGI 815681717
Dimensions9.02 × 4.08 × 2.33 mm
L/W Ratio2.21
Girdle conditionFaceted
Top View
9.02 mm4.08 mm0.51 ctG / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 815681717
Side View
Table 59.0%Crown 39.6°Girdle: MED-THKPavilion 34.8°Culet: NoneDepth 57.1%

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 27
Current: $3,340 NZD|Low: $666 NZD|High: $3,340 NZD|Avg: $1,175 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
October 28, 2026
Retailer 10$668 NZD
Retailer 5$805 NZD
Retailer 13$871 NZD
Retailer 4$938 NZD
Retailer 11$1,006 NZD
Retailer 8$1,047 NZD
Retailer 7$1,058 NZD
Retailer 9$1,092 NZD
Retailer 3$1,105 NZD
Retailer 2$1,121 NZD
Retailer 6$1,215 NZD
Retailer 12$2,016 NZD
NZ Jewellers$3,340 NZD

5 data points across 13 retailers

12 retailers$668 NZD to $3,340 NZD

A
Cheapest Retailer
-
$668 NZD
₹35,798 INR
Retailer 2
-
$871 NZD
$490 USD
View
Price last confirmed 8 days ago
Retailer 3
-
$938 NZD
$528 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$1,006 NZD
$566 USD
View
A
Retailer 5
-
$1,047 NZD
£464 GBP
View
B+
Retailer 6
-
$1,058 NZD
$595 USD
View
A
Retailer 7
-
$1,092 NZD
£484 GBP
View
Retailer 8
-
$1,105 NZD
$622 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$1,121 NZD
$631 USD
View
A
Retailer 10
-
$1,215 NZD
€651 EUR
View
Retailer 11
-
$2,016 NZD
£893 GBP
View
Price last confirmed 7 days ago
Most Expensive
C
NZ Jewellers
5fe76a14-e0cf-40a4-8f00-2a032bf2f2f6 · Oct 27
$3,340 NZD
$1,879 USD
View
11 more retailers have this diamond
Prices start from $668 NZDSave up to $2,671 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
0.51ct Marquise
$668 NZD