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Heart|Natural|GIA

1.00ct J SI2 Heart Natural Diamond

EX • J/SI2 • GIA 5316818821

Certificate GIA 5316818821

Diamond specifications and retailer prices

From £726 GBP
As of November 6, 2026
Save £1,638 GBP (69%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,365 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural heart diamond

This 1ct natural heart sits in the classic one-carat band, graded J 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 5316818821. Listed at 12 retailers as of November 5, 2026, with prices from £726 to £2,365, a £1,638 spread on the same certified stone. NZ Jewellers lists it at £2,365. 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

1.00
Carat
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5316818821
Dimensions5.75 × 6.77 × 4.21 mm
L/W Ratio1.18
Top View
5.75 mm6.77 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceFaint
CertificateGIA 5316818821
Side View
Table 59.0%CrownGirdle: MED-XTKPavilionCulet: NoneDepth 62.1%

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: £2,365 GBP|Low: £726 GBP|High: £2,365 GBP|Avg: £1,226 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 6£726 GBP
Retailer 2£791 GBP
Retailer 10£895 GBP
Retailer 8£970 GBP
Retailer 9£1,006 GBP
Retailer 3£1,011 GBP
Retailer 4£1,106 GBP
Retailer 7£1,118 GBP
Retailer 5£1,770 GBP
NZ Jewellers£2,365 GBP

37 data points across 10 retailers

12 retailers£726 GBP to £2,365 GBP

A
Cheapest Retailer
-
£726 GBP
A
Retailer 2
-
£791 GBP
View
B+
Retailer 3
-
£895 GBP
View
Final sale: no returns
B+
Retailer 4
-
£907 GBP
View
B+
Retailer 5
-
£970 GBP
View
B+
Retailer 6
-
£1,006 GBP
View
B+
Retailer 7
-
£1,011 GBP
View
B+
Retailer 8
-
£1,089 GBP
View
B+
Retailer 9
-
£1,106 GBP
View
B+
Retailer 10
-
£1,118 GBP
View
B
Retailer 11
-
£1,770 GBP
View
Most Expensive
B
NZ Jewellers
5c2adc8f-68a6-44c7-b33f-9f01ab030d19 · Nov 5
£2,365 GBP
$3,165 USD
View
11 more retailers have this diamond
Prices start from £726 GBPSave up to £1,638 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
1.00ct Heart
£726 GBP