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Radiant|Natural|GIA

0.51ct I SI1 Radiant Natural Diamond

VG • I/SI1 • GIA 1379698927

Certificate GIA 1379698927

Diamond specifications and retailer prices

From £391 GBP
As of November 6, 2026
Save £941 GBP (71%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,332 GBP at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1379698927. Listed at 15 retailers as of November 5, 2026, with prices from £391 to £1,332, a £941 spread on the same certified stone. NZ Jewellers lists it at £1,332. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1379698927
Dimensions5.12 × 4.07 × 2.59 mm
L/W Ratio1.26
Key to symbols
Needle, Feather, Crystal
Top View
5.12 mm4.07 mm0.51 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1379698927
Side View
Table 71.0%CrownGirdlePavilionCulet: NoneDepth 63.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,332 GBP|Low: £359 GBP|High: £1,332 GBP|Avg: £569 GBP
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
November 7, 2026
Retailer 7£390 GBP
Retailer 4£391 GBP
Retailer 13£421 GBP
Retailer 16£425 GBP
Retailer 14£457 GBP
Retailer 15£457 GBP
Retailer 8£474 GBP
Retailer 6£478 GBP
Retailer 3£490 GBP
Retailer 9£516 GBP
Retailer 10£518 GBP
Retailer 5£572 GBP
Retailer 11£628 GBP
Retailer 12£655 GBP
Retailer 2£976 GBP
NZ Jewellers£1,332 GBP

31 data points across 16 retailers

15 retailers£391 GBP to £1,332 GBP

B+
Cheapest Retailer
-
£391 GBP
Final sale: no returns
B+
Retailer 2
-
£421 GBP
View
A
Retailer 3
-
£425 GBP
View
B+
Retailer 4
-
£457 GBP
View
Retailer 5
-
£457 GBP
View
Price last confirmed 9 days ago
B+
Retailer 6
-
£478 GBP
View
B+
Retailer 7
-
£490 GBP
View
B+
Retailer 8
-
£516 GBP
View
B+
Retailer 9
-
£518 GBP
View
B+
Retailer 10
-
£523 GBP
View
B+
Retailer 11
-
£572 GBP
View
B
Retailer 12
-
£628 GBP
View
B
Retailer 13
-
£655 GBP
View
B
Retailer 14
-
£976 GBP
View
Most Expensive
C
NZ Jewellers
59126b56-8549-405a-82f9-ea03ad1831b6 · Nov 5
£1,332 GBP
$1,783 USD
View
14 more retailers have this diamond
Prices start from £391 GBPSave up to £941 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
£391 GBP