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Heart|Natural|GIA

1.20ct J SI2 Heart Natural Diamond

ID • J/SI2 • GIA 1539286592

Certificate GIA 1539286592

Diamond specifications and retailer prices

From £1,061 GBP
As of November 6, 2026
Save £1,387 GBP (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,408 GBP at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1.2ct natural heart diamond

This 1.2ct 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 1539286592. Listed at 15 retailers as of November 1, 2026, with a 131% 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

1.20
Carat
J
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1539286592
Dimensions7.36 × 6.60 × 4.26 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Twinning Wisp, Crystal, Cavity, Needle, Indented Natural
Top View
7.36 mm6.60 mm1.20 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1539286592
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 57.8%

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: £3,408 GBP|Low: £1,061 GBP|High: £3,443 GBP|Avg: £1,657 GBP|-1.0%
NZ Jewellers
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 8£1,061 GBP
Retailer 2£1,113 GBP
Retailer 10£1,282 GBP
Retailer 6£1,325 GBP
Retailer 3£1,397 GBP
Retailer 7£1,449 GBP
Retailer 12£1,462 GBP
Retailer 9£1,491 GBP
Retailer 5£1,508 GBP
Retailer 4£1,612 GBP
Retailer 11£2,448 GBP
NZ Jewellers£3,408 GBP

35 data points across 12 retailers

15 retailers£1,061 GBP to £2,448 GBP

A
Cheapest Retailer
-
£1,061 GBP
A
Retailer 2
-
£1,113 GBP
View
A
Retailer 3
-
£1,282 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,325 GBP
View
B+
Retailer 5
-
£1,342 GBP
View
Retailer 6
-
£1,397 GBP
View
Price last confirmed 21 days ago
Retailer 7
-
£1,397 GBP
View
Price last confirmed 19 days ago
B+
Retailer 8
-
£1,449 GBP
View
Retailer 9
-
£1,462 GBP
View
Price last confirmed 21 days ago
B+
Retailer 10
-
£1,470 GBP
View
B+
Retailer 11
-
£1,491 GBP
View
B+
Retailer 12
-
£1,508 GBP
View
Retailer 13
-
£1,612 GBP
View
Price last confirmed 18 days ago
B
Retailer 14
-
£2,448 GBP
View
Most Expensive
NZ Jewellers
258dd2b5-1842-4f77-85bb-64125eaa28cf · Oct 18
£3,408 GBP
$4,562 USD
View
Price last confirmed 19 days ago
14 more retailers have this diamond
Prices start from £1,061 GBPSave up to £1,387 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
1.20ct Heart
£1,061 GBP