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Heart|Natural|GIA

0.73ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 1518663425

Certificate GIA 1518663425

Diamond specifications and retailer prices

From £476 GBP
As of November 6, 2026
Save £716 GBP (60%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,619 GBP at NZ Jewellers · As of October 27, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1518663425. Listed at 11 retailers as of November 2, 2026, with a 151% 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1518663425
Dimensions5.34 × 6.22 × 3.60 mm
L/W Ratio1.16
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
5.34 mm6.22 mm0.73 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1518663425
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 57.9%

Caratlytics Score

How it works →
A
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 6
Current: £1,619 GBP|Low: £436 GBP|High: £1,619 GBP|Avg: £705 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 10£476 GBP
Retailer 6£516 GBP
Retailer 9£516 GBP
Retailer 7£536 GBP
Retailer 8£595 GBP
Retailer 11£595 GBP
Retailer 2£631 GBP
Retailer 4£684 GBP
Retailer 3£740 GBP
Retailer 5£1,192 GBP
NZ Jewellers£1,619 GBP

45 data points across 11 retailers

11 retailers£476 GBP to £1,192 GBP

A
Cheapest Retailer
-
£476 GBP
Final sale: no returns
Retailer 2
-
£516 GBP
View
Price last confirmed 11 days ago
Retailer 3
-
£516 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
£536 GBP
View
Price last confirmed 12 days ago
Retailer 5
-
£595 GBP
View
Price last confirmed 10 days ago
B+
Retailer 6
-
£595 GBP
View
B+
Retailer 7
-
£631 GBP
View
B
Retailer 8
-
£684 GBP
View
B
Retailer 9
-
£740 GBP
View
B
Retailer 10
-
£1,192 GBP
View
Most Expensive
NZ Jewellers
7bc0502e-d0d7-4bed-b708-09cf50921488 · Oct 27
£1,619 GBP
$2,167 USD
View
Price last confirmed 10 days ago
10 more retailers have this diamond
Prices start from £476 GBPSave up to £716 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.

A
0.73ct Heart
£476 GBP