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Radiant|Natural|GIA

0.51ct H SI2 Radiant Natural Diamond

EX • H/SI2 • GIA 6227209592

Certificate GIA 6227209592

Diamond specifications and retailer prices

From £646 GBP
$865 USD
As of November 2, 2026
Save £426 GBP (40%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,072 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant 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 stated by the retailer rather than the lab and certified by GIA 6227209592. Listed at 6 retailers as of November 2, 2026, with prices from £646 to £1,072, a £426 spread on the same certified stone. 77 Diamonds lists it at £1,072. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6227209592
Dimensions5.49 × 3.95 × 2.67 mm
L/W Ratio1.39
Top View
5.49 mm3.95 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6227209592
Side View
Table 70.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 67.4%

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 2
Current: £1,072 GBP|Low: £587 GBP|High: £1,074 GBP|Avg: £848 GBP|+2.3%
77 Diamonds
Retailer 2
November 2, 2026
Retailer 2£646 GBP
77 Diamonds£1,072 GBP

34 data points across 2 retailers

6 retailers£646 GBP to £1,072 GBP

B+
Cheapest Retailer
-
£646 GBP
$865 USD
Final sale: no returns
B
Retailer 2
-
£733 GBP
$982 USD
View
B
Retailer 3
-
£911 GBP
$1,220 USD
View
B
Retailer 4
-
£911 GBP
$1,220 USD
View
B
Retailer 5
-
£940 GBP
$1,260 USD
View
Most Expensive
B
77 Diamonds
RADMBRW26HHMT · Nov 2
£1,072 GBP
View
5 more retailers have this diamond
Prices start from £646 GBPSave up to £426 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 Radiant
£646 GBP