CaratHunter
Plans
Marquise|Natural|IGI

0.51ct G SI2 Marquise Natural Diamond

VG • G/SI2 • IGI 815673453

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 815673453

Diamond specifications and retailer prices

From $704 AUD
₹46,991 INR
As of November 2, 2026
Save $2,220 AUD (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,924 AUD at NZ Jewellers · As of October 30, 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 815673453. Listed at 12 retailers as of October 30, 2026, with prices from $704 to $2,924, a $2,220 spread on the same certified stone. NZ Jewellers lists it at $2,924. 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 angle33.3°
Pavilion angle39.6°
OriginNatural
Grading LabIGI
CertificateIGI 815673453
Dimensions7.82 × 4.19 × 2.67 mm
L/W Ratio1.87
Girdle conditionFaceted
Top View
7.82 mm4.19 mm0.51 ctG / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 815673453
Side View
Table 57.0%Crown 33.3°Girdle: MED-THKPavilion 39.6°Culet: NoneDepth 63.7%

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 2
Current: $2,924 AUD|Low: $704 AUD|High: $3,028 AUD|Avg: $1,291 AUD|-3.4%
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 2$704 AUD
Retailer 13$859 AUD
Retailer 9$932 AUD
Retailer 11$932 AUD
Retailer 10$969 AUD
Retailer 12$1,076 AUD
Retailer 4$1,121 AUD
Retailer 5$1,127 AUD
Retailer 3$1,147 AUD
Retailer 8$1,168 AUD
Retailer 6$1,271 AUD
Retailer 7$2,153 AUD
NZ Jewellers$2,924 AUD

41 data points across 13 retailers

12 retailers$704 AUD to $2,924 AUD

A
Cheapest Retailer
-
$704 AUD
₹46,991 INR
B+
Retailer 2
-
$859 AUD
$602 USD
View
Final sale: no returns
B+
Retailer 3
-
$932 AUD
$653 USD
View
B+
Retailer 4
-
$932 AUD
$653 USD
View
B+
Retailer 5
-
$969 AUD
$679 USD
View
B+
Retailer 6
-
$1,076 AUD
$754 USD
View
B+
Retailer 7
-
$1,121 AUD
$785 USD
View
B+
Retailer 8
-
$1,147 AUD
$804 USD
View
B+
Retailer 9
-
$1,168 AUD
£645 GBP
View
B+
Retailer 10
-
$1,271 AUD
€848 EUR
View
B
Retailer 11
-
$2,153 AUD
£1,188 GBP
View
Most Expensive
C
NZ Jewellers
e02205bb-7729-4121-9a6a-7e8c4dbfe1db · Oct 30
$2,924 AUD
$2,049 USD
View
11 more retailers have this diamond
Prices start from $704 AUDSave up to $2,220 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
0.51ct Marquise
$704 AUD