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Heart|Natural|GIA

1.00ct J SI2 Heart Natural Diamond

ID • J/SI2 • GIA 5231910068

Certificate GIA 5231910068

Diamond specifications and retailer prices

From £880 GBP
As of November 6, 2026
Save £738 GBP (46%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,879 GBP at NZ Jewellers · As of October 6, 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 5231910068. Listed at 13 retailers as of November 6, 2026, with a 84% 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

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

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5231910068
Dimensions5.80 × 6.66 × 4.06 mm
L/W Ratio1.15
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Natural
Top View
5.80 mm6.66 mm1.00 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231910068
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 60.9%

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: £1,187 GBP|Low: £880 GBP|High: £2,099 GBP|Avg: £1,279 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 6, 2026
Retailer 7£880 GBP
Retailer 11£949 GBP
Retailer 2£1,069 GBP
Retailer 12£1,106 GBP
Retailer 4£1,134 GBP
Retailer 1£1,187 GBP
Retailer 8£1,278 GBP
Retailer 9£1,278 GBP
Retailer 10£1,322 GBP
Retailer 3£1,417 GBP
Retailer 5£1,618 GBP
Retailer 6£2,099 GBP

32 data points across 12 retailers

13 retailers£880 GBP to £1,618 GBP

A
Cheapest Retailer
-
£880 GBP
A
Retailer 2
-
£949 GBP
View
Retailer 3
-
£1,069 GBP
View
Price last confirmed 30 days ago
B+
Retailer 4
-
£1,106 GBP
View
Retailer 5
-
£1,118 GBP
View
Price last confirmed 36 days ago
B+
Retailer 6
-
£1,187 GBP
View
Retailer 7
-
£1,233 GBP
View
Price last confirmed 30 days ago
B+
Retailer 8
-
£1,278 GBP
View
B+
Retailer 9
-
£1,278 GBP
View
B+
Retailer 10
-
£1,322 GBP
View
B+
Retailer 11
-
£1,618 GBP
View
Retailer 12
-
£2,099 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
b0e3e870-6a55-45e0-b748-5fc17e6bb4b0 · Oct 6
£2,879 GBP
$3,853 USD
View
Price last confirmed 31 days ago
12 more retailers have this diamond
Prices start from £880 GBPSave up to £738 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
£880 GBP