CaratHunter
Plans
Radiant|Natural|GIA

0.51ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 32721

Certificate GIA 32721

Diamond specifications and retailer prices

From £571 GBP
$765 USD
As of October 31, 2026
Save £62 GBP (10%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £634 GBP at B2C Jewels · As of November 2, 2026
View at B2C Jewels

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded I 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 32721. Listed at 2 retailers as of October 31, 2026, with a relatively tight 11% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 32721
Dimensions5.87 × 3.85 mm
L/W Ratio1.52
Top View
5.87 mm3.85 mm0.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 32721
Side View
Table 70.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.9%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: £634 GBP|Low: £571 GBP|High: £671 GBP|Avg: £618 GBP|-5.6%
B2C Jewels
Retailer 2
September 25, 2026
Retailer 2£571 GBP
B2C Jewels£634 GBP

6 data points across 2 retailers

2 retailers£571 GBP to £634 GBP

B+
Cheapest Retailer
-
£571 GBP
$765 USD
Most Expensive
B
B2C Jewels
22196192 · Nov 2
£634 GBP
$849 USD
View
1 more retailer has this diamond
Prices start from £571 GBPSave up to £62 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
£571 GBP