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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 £368 GBP
₹47,006 INR
As of November 1, 2026
Save £1,161 GBP (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,529 GBP 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 £368 to £1,529, a £1,161 spread on the same certified stone. NZ Jewellers lists it at £1,529. 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 1
Current: £1,529 GBP|Low: £368 GBP|High: £1,584 GBP|Avg: £675 GBP|-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 6£368 GBP
Retailer 13£449 GBP
Retailer 9£487 GBP
Retailer 11£487 GBP
Retailer 10£507 GBP
Retailer 12£563 GBP
Retailer 4£586 GBP
Retailer 5£590 GBP
Retailer 3£600 GBP
Retailer 8£611 GBP
Retailer 2£665 GBP
Retailer 7£1,126 GBP
NZ Jewellers£1,529 GBP

41 data points across 13 retailers

12 retailers£368 GBP to £1,529 GBP

A
Cheapest Retailer
-
£368 GBP
₹47,006 INR
B+
Retailer 2
-
£449 GBP
$602 USD
View
Final sale: no returns
B+
Retailer 3
-
£487 GBP
$653 USD
View
B+
Retailer 4
-
£487 GBP
$653 USD
View
B+
Retailer 5
-
£507 GBP
$679 USD
View
B+
Retailer 6
-
£563 GBP
$754 USD
View
B+
Retailer 7
-
£586 GBP
$785 USD
View
B+
Retailer 8
-
£600 GBP
$804 USD
View
B+
Retailer 9
-
£611 GBP
View
B+
Retailer 10
-
£665 GBP
€848 EUR
View
B
Retailer 11
-
£1,126 GBP
View
Most Expensive
C
NZ Jewellers
e02205bb-7729-4121-9a6a-7e8c4dbfe1db · Oct 30
£1,529 GBP
$2,049 USD
View
11 more retailers have this diamond
Prices start from £368 GBPSave up to £1,161 GBP

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
£368 GBP