Radiant|Natural|GIA

1.51ct I SI2 Radiant Natural Diamond

GD • I/SI2 • GIA 6525240450

Certificate GIA 6525240450

Diamond specifications and retailer prices

From £2,287 GBP
$3,069 USD
As of November 2, 2026
Save £2,728 GBP (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,015 GBP at NZ Jewellers · As of October 27, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6525240450. Listed at 14 retailers as of October 27, 2026, with prices from £2,287 to £5,015, a £2,728 spread on the same certified stone. NZ Jewellers lists it at £5,015. 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
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6525240450
Dimensions7.34 × 5.63 × 4.06 mm
L/W Ratio1.30
Top View
7.34 mm5.63 mm1.51 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6525240450
Side View
Table 67.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 72.1%

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: Nov 2
Current: £5,015 GBP|Low: £2,079 GBP|High: £5,015 GBP|Avg: £3,153 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6£2,262 GBP
Retailer 7£2,287 GBP
Retailer 9£2,607 GBP
Retailer 10£2,607 GBP
Retailer 8£2,708 GBP
Retailer 2£2,808 GBP
Retailer 4£2,944 GBP
Retailer 3£3,171 GBP
Retailer 5£4,814 GBP
NZ Jewellers£5,015 GBP

42 data points across 10 retailers

14 retailers£2,287 GBP to £5,015 GBP

Retailer 1
-
£2,262 GBP
$3,035 USD
Price last confirmed 8 days ago
B+
Retailer 2
-
£2,287 GBP
$3,069 USD
View
Final sale: no returns
B+
Retailer 3
-
£2,315 GBP
$3,107 USD
View
Retailer 4
-
£2,607 GBP
$3,499 USD
View
Price last confirmed 8 days ago
Retailer 5
-
£2,607 GBP
$3,499 USD
View
Price last confirmed 11 days ago
Retailer 6
-
£2,708 GBP
$3,634 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£2,808 GBP
View
B+
Retailer 8
-
£2,859 GBP
$3,836 USD
View
B+
Retailer 9
-
£2,944 GBP
View
Retailer 10
-
£3,009 GBP
$4,038 USD
View
Price last confirmed 10 days ago
B+
Retailer 11
-
£3,171 GBP
€4,053 EUR
View
Retailer 12
-
£3,259 GBP
$4,373 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
£4,814 GBP
View
Most Expensive
B
NZ Jewellers
363558b4-d8ed-4fd6-9675-3dbf51520a58 · Oct 27
£5,015 GBP
$6,730 USD
View
13 more retailers have this diamond
Prices start from £2,287 GBPSave up to £2,728 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+
1.51ct Radiant
£2,287 GBP