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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 $536 AUD
₹35,798 INR
As of October 27, 2026
Save $2,145 AUD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,681 AUD 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 $536 to $2,681, a $2,145 spread on the same certified stone. NZ Jewellers lists it at $2,681. 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: $2,681 AUD|Low: $535 AUD|High: $2,681 AUD|Avg: $944 AUD
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$536 AUD
Retailer 5$646 AUD
Retailer 13$699 AUD
Retailer 4$753 AUD
Retailer 11$808 AUD
Retailer 8$840 AUD
Retailer 7$849 AUD
Retailer 9$877 AUD
Retailer 3$887 AUD
Retailer 2$900 AUD
Retailer 6$975 AUD
Retailer 12$1,618 AUD
NZ Jewellers$2,681 AUD

5 data points across 13 retailers

12 retailers$536 AUD to $2,681 AUD

A
Cheapest Retailer
-
$536 AUD
₹35,798 INR
Retailer 2
-
$699 AUD
$490 USD
View
Price last confirmed 7 days ago
Retailer 3
-
$753 AUD
$528 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$808 AUD
$566 USD
View
A
Retailer 5
-
$840 AUD
£464 GBP
View
B+
Retailer 6
-
$849 AUD
$595 USD
View
A
Retailer 7
-
$877 AUD
£484 GBP
View
Retailer 8
-
$887 AUD
$622 USD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
$900 AUD
$631 USD
View
A
Retailer 10
-
$975 AUD
€651 EUR
View
Retailer 11
-
$1,618 AUD
£893 GBP
View
Price last confirmed 7 days ago
Most Expensive
C
NZ Jewellers
5fe76a14-e0cf-40a4-8f00-2a032bf2f2f6 · Oct 27
$2,681 AUD
$1,879 USD
View
11 more retailers have this diamond
Prices start from $536 AUDSave up to $2,145 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
$536 AUD