Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 2427623450

Certificate GIA 2427623450

Diamond specifications and retailer prices

From £5,138 GBP

$6,885 USD

As of October 28, 2026

Save £5,992 GBP (54%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: £11,130 GBP at NZ Jewellers · As of October 27, 2026

View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded H 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 2427623450. Listed at 19 retailers as of October 27, 2026, with prices from £5,138 to £11,130, a £5,992 spread on the same certified stone. NZ Jewellers lists it at £11,130. 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

SymmetryVery Good

FluorescenceNone

OriginNatural

Grading LabGIA

CertificateGIA 2427623450

Dimensions9.06 × 6.55 × 4.13 mm

L/W Ratio1.38

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryVery Good

FluorescenceNone

CertificateGIA 2427623450

Side View

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: Oct 28

Current: £6,204 GBP|Low: £5,138 GBP|High: £9,386 GBP|Avg: £6,476 GBP|-1.1%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

October 29, 2026

Retailer 9£5,138 GBP

Retailer 2£5,211 GBP

Retailer 11£5,553 GBP

Retailer 10£5,612 GBP

Retailer 3£6,121 GBP

Retailer 1£6,204 GBP

Retailer 4£6,307 GBP

Retailer 7£6,310 GBP

Retailer 6£6,891 GBP

Retailer 8£8,031 GBP

Retailer 5£9,324 GBP

35 data points across 11 retailers

19 retailers£5,138 GBP to £11,130 GBP

B+

Cheapest Retailer

£5,138 GBP

$6,885 USD

B+

Retailer 2

£5,211 GBP

$6,982 USD

View

Retailer 3

£5,553 GBP

$7,440 USD

View

Retailer 4

£5,565 GBP

$7,457 USD

View

Price last confirmed 7 days ago

Retailer 5

£5,612 GBP

$7,519 USD

View

B+

Retailer 6

£6,029 GBP

$8,078 USD

View

Retailer 7

£6,121 GBP

$8,202 USD

View

Price last confirmed 7 days ago

B+

Retailer 8

£6,204 GBP

View

Retailer 9

£6,222 GBP

$8,337 USD

View

B+

Retailer 10

£6,307 GBP

View

Retailer 11

£6,310 GBP

A$13,007 AUD

View

Price last confirmed 9 days ago

Retailer 12

£6,627 GBP

$8,880 USD

View

Retailer 13

£6,627 GBP

$8,880 USD

View

Retailer 14

£6,844 GBP

$9,170 USD

View

Retailer 15

£6,891 GBP

€8,794 EUR

View

Retailer 16

£6,957 GBP

$9,321 USD

View

Retailer 17

£8,031 GBP

ZAR 173,840 ZAR

View

Price last confirmed 10 days ago

Retailer 18

£9,324 GBP

View

Most Expensive

NZ Jewellers

6af18481-3122-4a53-afef-cf2890653e4f · Oct 27

£11,130 GBP

$14,913 USD

View

18 more retailers have this diamond

Prices start from £5,138 GBPSave up to £5,992 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

B+

1.51ct Oval

£5,138 GBP