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Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

GD • J/SI1 • GIA 2245065963

Certificate GIA 2245065963

Diamond specifications and retailer prices

From £1,157 GBP
As of November 6, 2026
Save £2,126 GBP (65%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,283 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2245065963. Listed at 10 retailers as of November 5, 2026, with prices from £1,157 to £3,283, a £2,126 spread on the same certified stone. NZ Jewellers lists it at £3,283. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle36.3°
OriginNatural
Grading LabGIA
CertificateGIA 2245065963
Dimensions6.62 × 7.00 × 4.26 mm
L/W Ratio1.06
Key to symbols
Twinning Wisp, Cloud, Needle
Top View
6.62 mm7.00 mm1.20 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2245065963
Side View
Table 55.0%CrownGirdle: THK-VTKPavilion 36.3°Culet: 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: £3,283 GBP|Low: £1,157 GBP|High: £3,490 GBP|Avg: £2,043 GBP|-6.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8£1,157 GBP
Retailer 10£1,494 GBP
Retailer 2£1,523 GBP
Retailer 5£1,570 GBP
Retailer 7£1,643 GBP
Retailer 6£1,730 GBP
Retailer 3£2,132 GBP
Retailer 4£2,400 GBP
Retailer 9£2,785 GBP
NZ Jewellers£3,283 GBP

36 data points across 10 retailers

10 retailers£1,157 GBP to £3,283 GBP

A
Cheapest Retailer
-
£1,157 GBP
B+
Retailer 2
-
£1,494 GBP
View
B+
Retailer 3
-
£1,523 GBP
View
B+
Retailer 4
-
£1,570 GBP
View
B+
Retailer 5
-
£1,643 GBP
View
B
Retailer 6
-
£1,730 GBP
View
B
Retailer 7
-
£2,132 GBP
View
B
Retailer 8
-
£2,400 GBP
View
B
Retailer 9
-
£2,785 GBP
View
Most Expensive
B
NZ Jewellers
f2091801-974d-4289-8b1b-2a6c1561c8dd · Nov 5
£3,283 GBP
$4,394 USD
View
9 more retailers have this diamond
Prices start from £1,157 GBPSave up to £2,126 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
£1,157 GBP