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Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 7551317215

Certificate GIA 7551317215

Diamond specifications and retailer prices

From £288 GBP
As of November 6, 2026
Save £937 GBP (77%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,224 GBP at NZ Jewellers · As of November 4, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7551317215. Listed at 15 retailers as of November 4, 2026, with prices from £288 to £1,224, a £937 spread on the same certified stone. NZ Jewellers lists it at £1,224. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 7551317215
Dimensions5.09 × 5.12 × 3.19 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Feather, Cloud
Top View
5.09 mm5.12 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7551317215
Side View
Table 57.0%Crown 35°Girdle: THN-MEDPavilion 41.4°Culet: NDepth 62.4%

Caratlytics Score

How it works →
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: Nov 6
Current: £1,224 GBP|Low: £288 GBP|High: £1,252 GBP|Avg: £506 GBP|-2.2%
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
November 6, 2026
Retailer 2£288 GBP
Retailer 3£311 GBP
Retailer 4£333 GBP
Retailer 7£377 GBP
Retailer 15£391 GBP
Retailer 5£417 GBP
Retailer 12£421 GBP
Retailer 6£426 GBP
Retailer 11£451 GBP
Retailer 9£482 GBP
Retailer 13£488 GBP
Retailer 8£528 GBP
Retailer 10£542 GBP
Retailer 14£902 GBP
NZ Jewellers£1,224 GBP

28 data points across 15 retailers

15 retailers£288 GBP to £1,224 GBP

A
Cheapest Retailer
-
£288 GBP
A
Retailer 2
-
£311 GBP
View
A
Retailer 3
-
£333 GBP
View
Retailer 4
-
£377 GBP
View
Price last confirmed 14 days ago
A
Retailer 5
-
£391 GBP
View
Retailer 6
-
£417 GBP
View
Price last confirmed 10 days ago
A
Retailer 7
-
£421 GBP
View
Retailer 8
-
£426 GBP
View
Price last confirmed 8 days ago
A
Retailer 9
-
£451 GBP
View
A
Retailer 10
-
£482 GBP
View
A
Retailer 11
-
£488 GBP
View
B+
Retailer 12
-
£528 GBP
View
B+
Retailer 13
-
£542 GBP
View
B
Retailer 14
-
£902 GBP
View
Most Expensive
B
NZ Jewellers
5725664b-4f38-49c7-bb37-be002fbda403 · Nov 4
£1,224 GBP
$1,648 USD
View
14 more retailers have this diamond
Prices start from £288 GBPSave up to £937 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
£288 GBP