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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 £281 GBP
₹35,798 INR
As of October 27, 2026
Save £1,122 GBP (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,402 GBP 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 £281 to £1,402, a £1,122 spread on the same certified stone. NZ Jewellers lists it at £1,402. 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: £1,402 GBP|Low: £280 GBP|High: £1,402 GBP|Avg: £494 GBP
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£281 GBP
Retailer 5£338 GBP
Retailer 13£366 GBP
Retailer 4£394 GBP
Retailer 11£422 GBP
Retailer 8£440 GBP
Retailer 7£444 GBP
Retailer 9£459 GBP
Retailer 3£464 GBP
Retailer 2£471 GBP
Retailer 6£510 GBP
Retailer 12£846 GBP
NZ Jewellers£1,402 GBP

5 data points across 13 retailers

12 retailers£281 GBP to £1,402 GBP

A
Cheapest Retailer
-
£281 GBP
₹35,798 INR
Retailer 2
-
£366 GBP
$490 USD
View
Price last confirmed 7 days ago
Retailer 3
-
£394 GBP
$528 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
£422 GBP
$566 USD
View
A
Retailer 5
-
£440 GBP
View
B+
Retailer 6
-
£444 GBP
$595 USD
View
A
Retailer 7
-
£459 GBP
View
Retailer 8
-
£464 GBP
$622 USD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
£471 GBP
$631 USD
View
A
Retailer 10
-
£510 GBP
€651 EUR
View
B
Retailer 11
-
£846 GBP
View
Most Expensive
C
NZ Jewellers
5fe76a14-e0cf-40a4-8f00-2a032bf2f2f6 · Oct 27
£1,402 GBP
$1,879 USD
View
11 more retailers have this diamond
Prices start from £281 GBPSave up to £1,122 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
£281 GBP