Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • GIA 6525056251

Certificate GIA 6525056251

Diamond specifications and retailer prices

From £2,067 GBP
As of November 4, 2026
Save £2,183 GBP (51%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,440 GBP at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6525056251. Listed at 18 retailers as of November 4, 2026, with a 106% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6525056251
Dimensions7.57 × 5.58 × 3.88 mm
L/W Ratio1.36
Top View
7.57 mm5.58 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6525056251
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.5%

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 4
Current: £2,637 GBP|Low: £2,010 GBP|High: £4,313 GBP|Avg: £2,841 GBP|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 8£2,010 GBP
Retailer 6£2,325 GBP
Retailer 9£2,397 GBP
Retailer 2£2,472 GBP
Retailer 7£2,618 GBP
Retailer 1£2,637 GBP
Retailer 3£2,967 GBP
Retailer 4£3,110 GBP
Retailer 5£4,250 GBP

40 data points across 9 retailers

18 retailers£2,067 GBP to £4,250 GBP

Retailer 1
-
£2,010 GBP
Price last confirmed 17 days ago
A
Retailer 2
-
£2,067 GBP
View
A
Retailer 3
-
£2,069 GBP
View
A
Retailer 4
-
£2,168 GBP
View
Retailer 5
-
£2,309 GBP
View
Price last confirmed 12 days ago
Retailer 6
-
£2,309 GBP
View
Price last confirmed 13 days ago
B+
Retailer 7
-
£2,325 GBP
View
Retailer 8
-
£2,397 GBP
View
Price last confirmed 13 days ago
B+
Retailer 9
-
£2,427 GBP
View
A
Retailer 10
-
£2,472 GBP
View
B+
Retailer 11
-
£2,618 GBP
View
B+
Retailer 12
-
£2,637 GBP
View
Retailer 13
-
£2,664 GBP
View
Price last confirmed 15 days ago
Retailer 14
-
£2,888 GBP
View
Price last confirmed 15 days ago
B+
Retailer 15
-
£2,967 GBP
View
B+
Retailer 16
-
£3,110 GBP
View
B
Retailer 17
-
£4,250 GBP
View
Most Expensive
NZ Jewellers
b03f8a28-4be2-450e-9357-369d22c74ae1 · Oct 24
£4,440 GBP
$5,943 USD
View
Price last confirmed 13 days ago
17 more retailers have this diamond
Prices start from £2,067 GBPSave up to £2,183 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
1.51ct Radiant
£2,067 GBP