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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 $674 USD
£531 GBP
As of October 28, 2026
Save $1,085 USD (62%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,759 USD 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 $674 to $1,759, a $1,085 spread on the same certified stone. NZ Jewellers lists it at $1,759. 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $1,759 USD|Low: $561 USD|High: $1,759 USD|Avg: $879 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 28, 2026
Retailer 6$561 USD
Retailer 5$604 USD
Retailer 3$674 USD
Retailer 8$684 USD
Retailer 2$786 USD
Retailer 7$831 USD
Retailer 4$1,298 USD
NZ Jewellers$1,759 USD

20 data points across 8 retailers

8 retailers$674 USD to $1,759 USD

A
Retailer 1
-
$561 USD
Price last confirmed 7 days ago
Retailer 2
-
$604 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$674 USD
£531 GBP
View
B+
Retailer 4
-
$684 USD
View
B+
Retailer 5
-
$786 USD
€749 EUR
View
B+
Retailer 6
-
$831 USD
View
B
Retailer 7
-
$1,298 USD
£1,022 GBP
View
Most Expensive
C
NZ Jewellers
68d5679f-f56e-440c-93f2-a3585682d507 · Oct 27
$1,759 USD
View
7 more retailers have this diamond
Prices start from $674 USDSave up to $1,085 USD

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
$674 USD