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Marquise|Natural|IGI

0.51ct J SI1 Marquise Natural Diamond

VG • J/SI1 • IGI 754532759

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 754532759

Diamond specifications and retailer prices

From £395 GBP
$530 USD
As of November 1, 2026
Save £844 GBP (68%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,239 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 754532759. Listed at 11 retailers as of October 30, 2026, with prices from £395 to £1,239, a £844 spread on the same certified stone. NZ Jewellers lists it at £1,239. 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
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle32.5°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 754532759
Dimensions8.22 × 4.13 × 2.61 mm
L/W Ratio1.99
Girdle conditionFaceted
Top View
8.22 mm4.13 mm0.51 ctJ / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 754532759
Side View
Table 60.0%Crown 32.5°Girdle: THN-VTKPavilion 41.5°Culet: NoneDepth 63.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £485 GBP|Low: £426 GBP|High: £924 GBP|Avg: £564 GBP|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 7£426 GBP
Retailer 8£440 GBP
Retailer 6£451 GBP
Retailer 1£485 GBP
Retailer 2£515 GBP
Retailer 3£590 GBP
Retailer 4£610 GBP
Retailer 5£917 GBP

42 data points across 8 retailers

11 retailers£395 GBP to £1,239 GBP

B+
Cheapest Retailer
-
£395 GBP
$530 USD
B+
Retailer 2
-
£426 GBP
$571 USD
View
B+
Retailer 3
-
£426 GBP
$571 USD
View
B+
Retailer 4
-
£451 GBP
$605 USD
View
B+
Retailer 5
-
£456 GBP
$612 USD
View
B+
Retailer 6
-
£485 GBP
View
B
Retailer 7
-
£515 GBP
View
B
Retailer 8
-
£590 GBP
€754 EUR
View
B
Retailer 9
-
£610 GBP
ZAR 13,219 ZAR
View
C
Retailer 10
-
£917 GBP
View
Most Expensive
C
NZ Jewellers
947aa185-d648-4229-a6f5-ea6f8c1825e0 · Oct 30
£1,239 GBP
$1,663 USD
View
10 more retailers have this diamond
Prices start from £395 GBPSave up to £844 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.

B+
0.51ct Marquise
£395 GBP