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Marquise|Natural|GIA

0.51ct G SI2 Marquise Natural Diamond

VG • G/SI2 • GIA 6552497564

Certificate GIA 6552497564

Diamond specifications and retailer prices

From £422 GBP
$566 USD
As of November 2, 2026
Save £1,161 GBP (73%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,584 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 stated by the retailer rather than the lab and certified by GIA 6552497564. Listed at 21 retailers as of October 30, 2026, with prices from £422 to £1,584, a £1,161 spread on the same certified stone. NZ Jewellers lists it at £1,584. 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 (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.6°
Pavilion angle41.5°
OriginNatural
Grading LabGIA
CertificateGIA 6552497564
Dimensions7.97 × 4.23 × 2.69 mm
L/W Ratio1.88
Girdle conditionFaceted
Top View
7.97 mm4.23 mm0.51 ctG / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552497564
Side View
Table 61.0%Crown 36.6°Girdle: MED-THKPavilion 41.5°Culet: NDepth 63.6%

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 2
Current: £1,584 GBP|Low: £363 GBP|High: £1,631 GBP|Avg: £619 GBP|-2.9%
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 12
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Retailer 20
November 2, 2026
Retailer 10£422 GBP
Retailer 15£433 GBP
Retailer 7£458 GBP
Retailer 11£459 GBP
Retailer 9£493 GBP
Retailer 12£493 GBP
Retailer 14£505 GBP
Retailer 17£513 GBP
Retailer 6£518 GBP
Retailer 4£528 GBP
Retailer 8£534 GBP
Retailer 5£560 GBP
Retailer 19£560 GBP
Retailer 20£582 GBP
Retailer 2£603 GBP
Retailer 13£618 GBP
Retailer 3£648 GBP
Retailer 18£676 GBP
Retailer 16£1,166 GBP
NZ Jewellers£1,584 GBP

29 data points across 20 retailers

21 retailers£422 GBP to £1,584 GBP

A
Cheapest Retailer
-
£422 GBP
$566 USD
Final sale: no returns
A
Retailer 2
-
£433 GBP
$580 USD
View
A
Retailer 3
-
£458 GBP
$613 USD
View
B+
Retailer 4
-
£459 GBP
HK$4,800 HKD
View
A
Retailer 5
-
£493 GBP
$660 USD
View
A
Retailer 6
-
£493 GBP
$660 USD
View
A
Retailer 7
-
£505 GBP
$676 USD
View
A
Retailer 8
-
£513 GBP
$687 USD
View
A
Retailer 9
-
£518 GBP
$694 USD
View
B+
Retailer 10
-
£528 GBP
$707 USD
View
A
Retailer 11
-
£534 GBP
$715 USD
View
B+
Retailer 12
-
£560 GBP
$750 USD
View
B+
Retailer 13
-
£560 GBP
$750 USD
View
B+
Retailer 14
-
£582 GBP
$780 USD
View
B+
Retailer 15
-
£603 GBP
View
B+
Retailer 16
-
£618 GBP
View
B+
Retailer 17
-
£648 GBP
$868 USD
View
Retailer 18
-
£674 GBP
View
Price last confirmed 36 days ago
B+
Retailer 19
-
£676 GBP
€863 EUR
View
B
Retailer 20
-
£1,166 GBP
View
Most Expensive
B
NZ Jewellers
76c2553c-4cf3-400f-8ed5-5859e1cdf99e · Oct 30
£1,584 GBP
$2,122 USD
View
20 more retailers have this diamond
Prices start from £422 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
£422 GBP