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Marquise|Natural|IGI

0.51ct G SI2 Marquise Natural Diamond

VG • G/SI2 • IGI 823661666

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 823661666

Diamond specifications and retailer prices

From $961 AUD
£531 GBP
As of October 28, 2026
Save $1,549 AUD (62%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,510 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 823661666. Listed at 8 retailers as of October 27, 2026, with prices from $961 to $2,510, a $1,549 spread on the same certified stone. NZ Jewellers lists it at $2,510. 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
SymmetryVery Good
FluorescenceNone
Crown angle34.2°
Pavilion angle39.4°
OriginNatural
Grading LabIGI
CertificateIGI 823661666
Dimensions7.88 × 4.18 × 2.58 mm
L/W Ratio1.89
Girdle conditionFaceted
Culet sizeNone
Top View
7.88 mm4.18 mm0.51 ctG / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 823661666
Side View
Table 62.0%Crown 34.2°Girdle: STK-VTKPavilion 39.4°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $2,510 AUD|Low: $800 AUD|High: $2,510 AUD|Avg: $1,254 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 28, 2026
Retailer 6$800 AUD
Retailer 5$862 AUD
Retailer 3$961 AUD
Retailer 8$976 AUD
Retailer 2$1,122 AUD
Retailer 7$1,186 AUD
Retailer 4$1,852 AUD
NZ Jewellers$2,510 AUD

20 data points across 8 retailers

8 retailers$961 AUD to $2,510 AUD

Retailer 1
-
$800 AUD
$561 USD
Price last confirmed 7 days ago
Retailer 2
-
$862 AUD
$604 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$961 AUD
£531 GBP
View
B+
Retailer 4
-
$976 AUD
$684 USD
View
B+
Retailer 5
-
$1,122 AUD
€749 EUR
View
B+
Retailer 6
-
$1,186 AUD
$831 USD
View
Retailer 7
-
$1,852 AUD
£1,022 GBP
View
Price last confirmed 7 days ago
Most Expensive
C
NZ Jewellers
68d5679f-f56e-440c-93f2-a3585682d507 · Oct 27
$2,510 AUD
$1,759 USD
View
7 more retailers have this diamond
Prices start from $961 AUDSave up to $1,549 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
$961 AUD