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Radiant|Natural|GIA

0.51ct G SI2 Radiant Natural Diamond

ID • G/SI2 • GIA 2556750688

Certificate GIA 2556750688

Diamond specifications and retailer prices

From £334 GBP
$448 USD
As of November 1, 2026
Save £965 GBP (74%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,299 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded G 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 2556750688. Listed at 17 retailers as of October 30, 2026, with prices from £334 to £1,299, a £965 spread on the same certified stone. NZ Jewellers lists it at £1,299. 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
G
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle53.9°
OriginNatural
Grading LabGIA
CertificateGIA 2556750688
Dimensions5.96 × 3.87 × 2.61 mm
L/W Ratio1.54
Girdle conditionPolished
Culet sizeNone
Top View
5.96 mm3.87 mm0.51 ctG / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556750688
Side View
Table 66.0%Crown 36°Girdle: MED-STKPavilion 53.9°Culet: NoneDepth 67.5%

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 1
Current: £1,299 GBP|Low: £295 GBP|High: £1,343 GBP|Avg: £506 GBP|-3.2%
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
Retailer 16
Retailer 17
November 1, 2026
Retailer 15£334 GBP
Retailer 6£346 GBP
Retailer 2£355 GBP
Retailer 4£375 GBP
Retailer 9£382 GBP
Retailer 7£405 GBP
Retailer 8£405 GBP
Retailer 3£433 GBP
Retailer 13£437 GBP
Retailer 5£455 GBP
Retailer 10£495 GBP
Retailer 11£519 GBP
Retailer 16£519 GBP
Retailer 17£527 GBP
Retailer 14£556 GBP
Retailer 12£957 GBP
NZ Jewellers£1,299 GBP

36 data points across 17 retailers

17 retailers£334 GBP to £1,299 GBP

A
Cheapest Retailer
-
£334 GBP
$448 USD
A
Retailer 2
-
£346 GBP
$464 USD
View
Final sale: no returns
A
Retailer 3
-
£355 GBP
$475 USD
View
A
Retailer 4
-
£375 GBP
$503 USD
View
A
Retailer 5
-
£382 GBP
HK$4,000 HKD
View
A
Retailer 6
-
£405 GBP
$542 USD
View
A
Retailer 7
-
£405 GBP
$542 USD
View
A
Retailer 8
-
£433 GBP
$580 USD
View
A
Retailer 9
-
£437 GBP
$585 USD
View
A
Retailer 10
-
£455 GBP
$609 USD
View
A
Retailer 11
-
£495 GBP
View
A
Retailer 12
-
£519 GBP
View
A
Retailer 13
-
£519 GBP
View
A
Retailer 14
-
£527 GBP
$706 USD
View
B+
Retailer 15
-
£556 GBP
€710 EUR
View
B
Retailer 16
-
£957 GBP
View
Most Expensive
B
NZ Jewellers
e6671163-bf29-4252-8837-769f134d2016 · Oct 30
£1,299 GBP
$1,741 USD
View
16 more retailers have this diamond
Prices start from £334 GBPSave up to £965 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 Radiant
£334 GBP