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Radiant|Natural|GIA

0.51ct F SI1 Radiant Natural Diamond

EX • F/SI1 • GIA 6542238999

Certificate GIA 6542238999

Diamond specifications and retailer prices

From £506 GBP
SGD 918 SGD
As of October 27, 2026
Save £205 GBP (29%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,527 GBP at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542238999. Listed at 16 retailers as of October 27, 2026, with a 41% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6542238999
Dimensions5.41 × 4.27 × 2.76 mm
L/W Ratio1.27
Top View
5.41 mm4.27 mm0.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6542238999
Side View
Table 64.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 64.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: £1,527 GBP|Low: £461 GBP|High: £1,527 GBP|Avg: £683 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
October 27, 2026
Retailer 8£461 GBP
Retailer 13£487 GBP
Retailer 15£487 GBP
Retailer 16£506 GBP
Retailer 7£506 GBP
Retailer 14£562 GBP
Retailer 5£578 GBP
Retailer 6£585 GBP
Retailer 9£596 GBP
Retailer 2£600 GBP
Retailer 3£626 GBP
Retailer 10£711 GBP
Retailer 4£732 GBP
Retailer 11£750 GBP
Retailer 12£1,126 GBP
NZ Jewellers£1,527 GBP

37 data points across 16 retailers

16 retailers£506 GBP to £711 GBP

Retailer 1
-
£461 GBP
$618 USD
Price last confirmed 8 days ago
Retailer 2
-
£487 GBP
$653 USD
View
Price last confirmed 7 days ago
Retailer 3
-
£487 GBP
$653 USD
View
Price last confirmed 8 days ago
Retailer 4
-
£506 GBP
$679 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£506 GBP
SGD 918 SGD
View
Retailer 6
-
£562 GBP
$754 USD
View
Price last confirmed 10 days ago
Retailer 7
-
£578 GBP
$776 USD
View
Price last confirmed 7 days ago
Retailer 8
-
£585 GBP
$785 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£596 GBP
View
B+
Retailer 10
-
£600 GBP
View
Retailer 11
-
£626 GBP
$840 USD
View
Price last confirmed 5 days ago
B+
Retailer 12
-
£711 GBP
€909 EUR
View
Retailer 13
-
£732 GBP
A$1,512 AUD
View
Price last confirmed 29 days ago
Retailer 14
-
£750 GBP
ZAR 16,255 ZAR
View
Price last confirmed 7 days ago
Retailer 15
-
£1,126 GBP
View
Price last confirmed 7 days ago
Most Expensive
NZ Jewellers
b7f5f9fc-64ef-45e7-8d38-debddd2aca39 · Oct 24
£1,527 GBP
$2,049 USD
View
Price last confirmed 9 days ago
15 more retailers have this diamond
Prices start from £506 GBPSave up to £205 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 Radiant
£506 GBP