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Round|Natural|GIA

0.51ct H FL Round Natural Diamond

EX • H/FL • GIA 2526003007

Certificate GIA 2526003007

Diamond specifications and retailer prices

From £699 GBP
As of November 4, 2026
Save £685 GBP (50%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,384 GBP at MOH London · As of November 4, 2026
View at MOH London

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 2526003007. Listed at 5 retailers as of November 4, 2026, with prices from £699 to £1,384, a £685 spread on the same certified stone. MOH London lists it at £1,384. 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 angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2526003007
Dimensions5.13 × 5.10 × 3.19 mm
L/W Ratio1.01
Star length50%
Top View
5.13 mm5.10 mm0.51 ctH / FL
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2526003007
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,384 GBP|Low: £545 GBP|High: £1,414 GBP|Avg: £1,003 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 3£699 GBP
Retailer 2£983 GBP
Retailer 4£987 GBP
Retailer 5£1,028 GBP
MOH London£1,384 GBP

29 data points across 5 retailers

5 retailers£699 GBP to £1,384 GBP

B+
Cheapest Retailer
-
£699 GBP
Final sale: no returns
B+
Retailer 2
-
£983 GBP
View
B+
Retailer 3
-
£987 GBP
View
B
Retailer 4
-
£1,028 GBP
View
Most Expensive
B
MOH London
A1ED5459D · Nov 4
£1,384 GBP
View
4 more retailers have this diamond
Prices start from £699 GBPSave up to £685 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.

B+
0.51ct Round
£699 GBP