Radiant|Natural|GIA

1.51ct D SI1 Radiant Natural Diamond

EX • D/SI1 • GIA 6555417728

Certificate GIA 6555417728

Diamond specifications and retailer prices

From £4,423 GBP

A$9,118 AUD

As of October 31, 2026

10 retailers carry this diamond

Most expensive: £7,553 GBP at NZ Jewellers · As of September 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555417728. Listed at 10 retailers as of October 31, 2026. 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

FluorescenceMedium

OriginNatural

Grading LabGIA

CertificateGIA 6555417728

Dimensions7.54 × 5.78 × 3.94 mm

L/W Ratio1.30

Girdle conditionPolished

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceMedium

CertificateGIA 6555417728

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: £7,553 GBP|Low: £3,324 GBP|High: £8,077 GBP|Avg: £4,587 GBP|-6.5%

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

September 30, 2026

Retailer 3£3,324 GBP

Retailer 10£3,441 GBP

Retailer 5£3,461 GBP

Retailer 15£3,600 GBP

Retailer 2£3,795 GBP

Retailer 9£3,826 GBP

Retailer 4£3,832 GBP

Retailer 11£3,944 GBP

Retailer 6£3,963 GBP

Retailer 7£3,977 GBP

Retailer 16£4,199 GBP

Retailer 13£4,277 GBP

Retailer 20£4,330 GBP

Retailer 12£4,423 GBP

Retailer 14£4,454 GBP

Retailer 18£4,834 GBP

Retailer 8£5,474 GBP

Retailer 17£6,733 GBP

Retailer 19£7,079 GBP

NZ Jewellers£7,553 GBP

14 data points across 20 retailers

10 retailers

Retailer 1

£3,324 GBP

HK$34,800 HKD

Price last confirmed 33 days ago

Retailer 2

£3,795 GBP

€4,843 EUR

View

Price last confirmed 31 days ago

Retailer 3

£3,963 GBP

$5,310 USD

View

Price last confirmed 32 days ago

Retailer 4

£4,277 GBP

View

Price last confirmed 31 days ago

Retailer 5

£4,330 GBP

$5,802 USD

View

Price last confirmed 33 days ago

Retailer 6

£4,423 GBP

A$9,118 AUD

View

Retailer 7

£4,454 GBP

A$9,180 AUD

View

Price last confirmed 31 days ago

Retailer 8

£5,474 GBP

ZAR 118,495 ZAR

View

Price last confirmed 36 days ago

Retailer 9

£7,079 GBP

$9,485 USD

View

Price last confirmed 33 days ago

Most Expensive

NZ Jewellers

713935f0-ce7f-4697-ab11-385cbfb65944 · Sep 30

£7,553 GBP

$10,120 USD

View

Price last confirmed 31 days ago

9 more retailers have this diamond

Prices start from £4,423 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.

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