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Marquise|Natural|GIA

0.51ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 6561486563

Certificate GIA 6561486563

Diamond specifications and retailer prices

From £385 GBP
₹49,190 INR
As of November 1, 2026
Save £1,240 GBP (76%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,625 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6561486563. Listed at 17 retailers as of October 30, 2026, with prices from £385 to £1,625, a £1,240 spread on the same certified stone. NZ Jewellers lists it at £1,625. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6561486563
Dimensions8.17 × 4.17 × 2.65 mm
L/W Ratio1.96
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal
Top View
8.17 mm4.17 mm0.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6561486563
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 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 1
Current: £1,625 GBP|Low: £384 GBP|High: £1,625 GBP|Avg: £721 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
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 2£385 GBP
Retailer 15£439 GBP
Retailer 7£478 GBP
Retailer 5£490 GBP
Retailer 4£518 GBP
Retailer 14£518 GBP
Retailer 6£522 GBP
Retailer 3£538 GBP
Retailer 16£598 GBP
Retailer 8£616 GBP
Retailer 9£619 GBP
Retailer 11£640 GBP
Retailer 12£737 GBP
Retailer 10£1,196 GBP
Retailer 13£1,420 GBP
NZ Jewellers£1,625 GBP

23 data points across 16 retailers

17 retailers£385 GBP to £1,625 GBP

A
Cheapest Retailer
-
£385 GBP
₹49,190 INR
A
Retailer 2
-
£439 GBP
HK$4,600 HKD
View
A
Retailer 3
-
£478 GBP
$641 USD
View
Final sale: no returns
A
Retailer 4
-
£490 GBP
$658 USD
View
A
Retailer 5
-
£518 GBP
$695 USD
View
A
Retailer 6
-
£518 GBP
$695 USD
View
Retailer 7
-
£522 GBP
$700 USD
View
Price last confirmed 15 days ago
A
Retailer 8
-
£538 GBP
$722 USD
View
B+
Retailer 9
-
£589 GBP
$791 USD
View
B+
Retailer 10
-
£598 GBP
$802 USD
View
B+
Retailer 11
-
£616 GBP
$827 USD
View
B+
Retailer 12
-
£619 GBP
View
B+
Retailer 13
-
£640 GBP
View
B+
Retailer 14
-
£737 GBP
€942 EUR
View
B
Retailer 15
-
£1,196 GBP
View
B
Retailer 16
-
£1,420 GBP
View
Most Expensive
B
NZ Jewellers
0e39f16e-32f4-4a7b-8134-663cf265877c · Oct 30
£1,625 GBP
$2,180 USD
View
16 more retailers have this diamond
Prices start from £385 GBPSave up to £1,240 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
£385 GBP