Radiant|Natural|GIA

1.51ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 6535513328

Certificate GIA 6535513328

Diamond specifications and retailer prices

From £2,278 GBP

$3,053 USD

As of October 31, 2026

Save £2,887 GBP (56%) vs most expensive(unlock to see where)

28 retailers carry this diamond

Most expensive: £5,165 GBP at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6535513328. Listed at 28 retailers as of October 30, 2026, with prices from £2,278 to £5,165, a £2,887 spread on the same certified stone. NZ Jewellers lists it at £5,165. 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

1.51

Carat

Colour

SI1

Clarity

Excellent

Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle44.83°

Pavilion angle30.94°

OriginNatural

Grading LabGIA

CertificateGIA 6535513328

Dimensions7.22 × 5.66 × 3.94 mm

L/W Ratio1.28

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 6535513328

Side View

Caratlytics Score

How it works →

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: Oct 31

Current: £5,165 GBP|Low: £2,002 GBP|High: £5,165 GBP|Avg: £3,066 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

Retailer 17

Retailer 18

Retailer 19

Retailer 20

Retailer 21

Retailer 22

Retailer 23

Retailer 24

Retailer 25

Retailer 26

November 2, 2026

Retailer 12£2,278 GBP

Retailer 8£2,336 GBP

Retailer 2£2,337 GBP

Retailer 11£2,352 GBP

Retailer 7£2,384 GBP

Retailer 10£2,479 GBP

Retailer 24£2,582 GBP

Retailer 6£2,686 GBP

Retailer 14£2,686 GBP

Retailer 9£2,689 GBP

Retailer 16£2,722 GBP

Retailer 23£2,789 GBP

Retailer 25£2,921 GBP

Retailer 15£2,933 GBP

Retailer 20£3,033 GBP

Retailer 5£3,038 GBP

Retailer 26£3,038 GBP

Retailer 4£3,099 GBP

Retailer 3£3,142 GBP

Retailer 17£3,173 GBP

Retailer 19£3,266 GBP

Retailer 13£3,268 GBP

Retailer 22£3,644 GBP

Retailer 18£4,284 GBP

Retailer 21£4,958 GBP

NZ Jewellers£5,165 GBP

33 data points across 26 retailers

28 retailers£2,278 GBP to £5,165 GBP

Cheapest Retailer

£2,278 GBP

$3,053 USD

Retailer 2

£2,336 GBP

$3,130 USD

View

Retailer 3

£2,337 GBP

$3,131 USD

View

Retailer 4

£2,352 GBP

$3,152 USD

View

Retailer 5

£2,384 GBP

$3,194 USD

View

Retailer 6

£2,479 GBP

$3,322 USD

View

Final sale: no returns

Retailer 7

£2,582 GBP

$3,460 USD

View

Retailer 8

£2,686 GBP

$3,599 USD

View

Retailer 9

£2,686 GBP

$3,599 USD

View

Retailer 10

£2,689 GBP

$3,603 USD

View

Retailer 11

£2,722 GBP

$3,647 USD

View

Price last confirmed 10 days ago

Retailer 12

£2,789 GBP

$3,737 USD

View

B+

Retailer 13

£2,921 GBP

$3,914 USD

View

B+

Retailer 14

£2,933 GBP

$3,930 USD

View

B+

Retailer 15

£3,012 GBP

A$6,208 AUD

View

B+

Retailer 16

£3,033 GBP

View

B+

Retailer 17

£3,038 GBP

$4,070 USD

View

B+

Retailer 18

£3,038 GBP

$4,070 USD

View

B+

Retailer 19

£3,099 GBP

$4,152 USD

View

B+

Retailer 20

£3,142 GBP

$4,210 USD

View

B+

Retailer 21

£3,173 GBP

$4,252 USD

View

Retailer 22

£3,266 GBP

A$6,733 AUD

View

Price last confirmed 29 days ago

B+

Retailer 23

£3,268 GBP

€4,170 EUR

View

Retailer 24

£3,355 GBP

$4,496 USD

View

Price last confirmed 56 days ago

B+

Retailer 25

£3,644 GBP

ZAR 78,880 ZAR

View

Retailer 26

£4,284 GBP

$5,740 USD

View

Retailer 27

£4,958 GBP

View

Most Expensive

NZ Jewellers

ab8e341f-9ded-4f5f-a81b-1fa39f0abccc · Oct 30

£5,165 GBP

$6,921 USD

View

27 more retailers have this diamond

Prices start from £2,278 GBPSave up to £2,887 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.

Similar diamonds

1.51ct Radiant

£2,278 GBP