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Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

ID • J/SI1 • GIA 2556719376

Certificate GIA 2556719376

Diamond specifications and retailer prices

From £1,917 GBP
As of November 6, 2026
Save £2,433 GBP (56%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £4,350 GBP at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556719376. Listed at 23 retailers as of November 5, 2026, with prices from £1,917 to £4,350, a £2,433 spread on the same certified stone. NZ Jewellers lists it at £4,350. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle39.38°
Pavilion angle38.46°
OriginNatural
Grading LabGIA
CertificateGIA 2556719376
Dimensions6.34 × 7.24 × 4.30 mm
L/W Ratio1.14
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
6.34 mm7.24 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2556719376
Side View
Table 61.0%Crown 39.38°Girdle: STK-VTKPavilion 38.46°Culet: NoneDepth 59.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,917 GBP|Low: £1,917 GBP|High: £4,220 GBP|Avg: £2,660 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 1£1,917 GBP
Retailer 9£1,922 GBP
Retailer 7£2,197 GBP
Retailer 10£2,384 GBP
Retailer 3£2,422 GBP
Retailer 5£2,584 GBP
Retailer 4£2,672 GBP
Retailer 2£2,878 GBP
Retailer 6£3,047 GBP
Retailer 8£4,164 GBP

25 data points across 10 retailers

23 retailers£1,917 GBP to £4,350 GBP

B+
Cheapest Retailer
-
£1,917 GBP
B+
Retailer 2
-
£1,922 GBP
View
B
Retailer 3
-
£2,142 GBP
View
B+
Retailer 4
-
£2,197 GBP
View
B
Retailer 5
-
£2,217 GBP
View
B
Retailer 6
-
£2,304 GBP
View
Final sale: no returns
B
Retailer 7
-
£2,384 GBP
View
B
Retailer 8
-
£2,413 GBP
View
B
Retailer 9
-
£2,422 GBP
View
B
Retailer 10
-
£2,497 GBP
View
Retailer 11
-
£2,497 GBP
View
Price last confirmed 9 days ago
B
Retailer 12
-
£2,584 GBP
View
B
Retailer 13
-
£2,593 GBP
View
B
Retailer 14
-
£2,604 GBP
View
Retailer 15
-
£2,667 GBP
View
Price last confirmed 31 days ago
B
Retailer 16
-
£2,672 GBP
View
B
Retailer 17
-
£2,672 GBP
View
B
Retailer 18
-
£2,760 GBP
View
B
Retailer 19
-
£2,881 GBP
View
B
Retailer 20
-
£3,047 GBP
View
B
Retailer 21
-
£3,718 GBP
View
B
Retailer 22
-
£4,164 GBP
View
Most Expensive
B
NZ Jewellers
64a0fccb-8343-41c4-9706-32672873e768 · Nov 5
£4,350 GBP
$5,823 USD
View
22 more retailers have this diamond
Prices start from £1,917 GBPSave up to £2,433 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.

B+
1.20ct Heart
£1,917 GBP