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0.51ct H FL Round Natural Diamond

EX • H/FL • GIA 1509815203

Certificate GIA 1509815203

Diamond specifications and retailer prices

From £668 GBP
As of November 4, 2026
Save £1,602 GBP (71%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,270 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 1509815203. Listed at 8 retailers as of October 30, 2026, with prices from £668 to £2,270, a £1,602 spread on the same certified stone. NZ Jewellers lists it at £2,270. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
H
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1509815203
Dimensions5.16 × 5.20 × 3.14 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
5.16 mm5.20 mm0.51 ctH / FL
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509815203
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.7%

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 4
Current: £2,270 GBP|Low: £527 GBP|High: £2,310 GBP|Avg: £1,168 GBP|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 5£668 GBP
Retailer 3£847 GBP
Retailer 2£940 GBP
Retailer 6£951 GBP
Retailer 7£984 GBP
Retailer 4£1,323 GBP
NZ Jewellers£2,270 GBP

32 data points across 7 retailers

8 retailers£668 GBP to £2,270 GBP

A
Cheapest Retailer
-
£668 GBP
Final sale: no returns
B+
Retailer 2
-
£847 GBP
View
B+
Retailer 3
-
£940 GBP
View
B+
Retailer 4
-
£951 GBP
View
B+
Retailer 5
-
£984 GBP
View
B
Retailer 6
-
£1,323 GBP
View
B
Retailer 7
-
£1,427 GBP
View
Most Expensive
B
NZ Jewellers
ae09c55e-2bc0-4d57-9fab-3cbe3d830e9b · Oct 30
£2,270 GBP
$3,064 USD
View
7 more retailers have this diamond
Prices start from £668 GBPSave up to £1,602 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 Round
£668 GBP