Heart|Natural|GIA

0.73ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 5543746599

Certificate GIA 5543746599

Diamond specifications and retailer prices

From £449 GBP

HK$4,700 HKD

As of November 1, 2026

Save £613 GBP (58%) vs most expensive(unlock to see where)

15 retailers carry this diamond

Most expensive: £1,993 GBP at NZ Jewellers · As of September 25, 2026

View at NZ Jewellers

About this 0.73ct natural heart diamond

This 0.73ct natural heart sits in the half to three-quarter carat band, graded I 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 5543746599. Listed at 15 retailers as of November 1, 2026, with a 136% 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

0.73

Carat

Colour

SI1

Clarity

Excellent

Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent

PolishExcellent

SymmetryVery Good

FluorescenceNone

Pavilion angle37.9°

OriginNatural

Grading LabGIA

CertificateGIA 5543746599

Dimensions5.74 × 6.43 × 3.51 mm

L/W Ratio1.12

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryVery Good

FluorescenceNone

CertificateGIA 5543746599

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: £621 GBP|Low: £449 GBP|High: £1,147 GBP|Avg: £732 GBP|-6.0%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

November 1, 2026

Retailer 6£449 GBP

Retailer 11£534 GBP

Retailer 10£575 GBP

Retailer 9£584 GBP

Retailer 1£621 GBP

Retailer 4£642 GBP

Retailer 7£696 GBP

Retailer 13£724 GBP

Retailer 3£765 GBP

Retailer 12£893 GBP

Retailer 5£933 GBP

Retailer 2£933 GBP

Retailer 8£1,062 GBP

29 data points across 13 retailers

15 retailers£449 GBP to £1,062 GBP

Cheapest Retailer

£449 GBP

HK$4,700 HKD

B+

Retailer 2

£534 GBP

$716 USD

View

Final sale: no returns

B+

Retailer 3

£575 GBP

$770 USD

View

B+

Retailer 4

£584 GBP

€745 EUR

View

B+

Retailer 5

£621 GBP

$832 USD

View

Retailer 6

£642 GBP

SGD 1,163 SGD

View

Price last confirmed 9 days ago

B+

Retailer 7

£696 GBP

View

B+

Retailer 8

£724 GBP

$970 USD

View

B+

Retailer 9

£765 GBP

$1,025 USD

View

Retailer 10

£893 GBP

ZAR 19,335 ZAR

View

Retailer 11

£901 GBP

A$1,858 AUD

View

Retailer 12

£933 GBP

A$1,923 AUD

View

Price last confirmed 29 days ago

Retailer 13

£933 GBP

$1,250 USD

View

Price last confirmed 9 days ago

Retailer 14

£1,062 GBP

View

Most Expensive

NZ Jewellers

7d2e26c3-61c1-4cd7-b587-e47e85048a09 · Sep 25

£1,993 GBP

$2,670 USD

View

Price under review

14 more retailers have this diamond

Prices start from £449 GBPSave up to £613 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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0.73ct Heart

£449 GBP