Heart|Natural|GIA

1.51ct F SI1 Heart Natural Diamond

ID • F/SI1 • GIA 5553228913

Certificate GIA 5553228913

Diamond specifications and retailer prices

From £3,635 GBP

$4,878 USD

As of November 1, 2026

Save £2,693 GBP (43%) vs most expensive(unlock to see where)

20 retailers carry this diamond

Most expensive: £7,406 GBP at NZ Jewellers · As of September 30, 2026

View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded F 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 5553228913. Listed at 20 retailers as of November 1, 2026, with a 74% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

Ideal

Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal

PolishExcellent

SymmetryExcellent

FluorescenceFaint

Crown angle37°

Pavilion angle43.22°

OriginNatural

Grading LabGIA

CertificateGIA 5553228913

Dimensions7.94 × 6.77 × 4.82 mm

L/W Ratio1.17

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceFaint

CertificateGIA 5553228913

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: Nov 1

Current: £4,693 GBP|Low: £3,208 GBP|High: £6,602 GBP|Avg: £4,672 GBP|-0.5%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

November 2, 2026

Retailer 12£3,635 GBP

Retailer 11£3,747 GBP

Retailer 9£3,902 GBP

Retailer 2£3,965 GBP

Retailer 8£4,013 GBP

Retailer 5£4,191 GBP

Retailer 6£4,411 GBP

Retailer 4£4,428 GBP

Retailer 3£4,435 GBP

Retailer 1£4,693 GBP

Retailer 10£5,278 GBP

Retailer 7£6,329 GBP

42 data points across 12 retailers

20 retailers£3,635 GBP to £6,329 GBP

Cheapest Retailer

£3,635 GBP

$4,878 USD

Retailer 2

£3,747 GBP

$5,028 USD

View

Retailer 3

£3,902 GBP

$5,236 USD

View

B+

Retailer 4

£3,965 GBP

$5,321 USD

View

Final sale: no returns

B+

Retailer 5

£4,013 GBP

$5,385 USD

View

B+

Retailer 6

£4,191 GBP

View

B+

Retailer 7

£4,411 GBP

$5,920 USD

View

Retailer 8

£4,428 GBP

$5,942 USD

View

Price last confirmed 32 days ago

Retailer 9

£4,428 GBP

$5,942 USD

View

Price last confirmed 32 days ago

Retailer 10

£4,428 GBP

$5,942 USD

View

Price last confirmed 48 days ago

Retailer 11

£4,428 GBP

$5,942 USD

View

Price last confirmed 17 days ago

Retailer 12

£4,435 GBP

A$9,156 AUD

View

Price last confirmed 23 days ago

B+

Retailer 13

£4,541 GBP

$6,093 USD

View

B+

Retailer 14

£4,693 GBP

€5,998 EUR

View

Retailer 15

£5,109 GBP

$6,856 USD

View

Price last confirmed 56 days ago

Retailer 16

£5,109 GBP

$6,856 USD

View

Price last confirmed 34 days ago

Retailer 17

£5,109 GBP

$6,856 USD

View

Price last confirmed 48 days ago

B+

Retailer 18

£5,278 GBP

ZAR 114,423 ZAR

View

Retailer 19

£6,329 GBP

View

Most Expensive

NZ Jewellers

5c00d538-971f-4924-a6de-5e7610e26984 · Sep 30

£7,406 GBP

$9,938 USD

View

Price last confirmed 33 days ago

19 more retailers have this diamond

Prices start from £3,635 GBPSave up to £2,693 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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1.51ct Heart

£3,635 GBP