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Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 6382112830

Certificate GIA 6382112830

Diamond specifications and retailer prices

From £1,755 GBP
As of November 6, 2026
Save £2,390 GBP (58%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,145 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 6382112830. Listed at 20 retailers as of November 5, 2026, with prices from £1,755 to £4,145, a £2,390 spread on the same certified stone. NZ Jewellers lists it at £4,145. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6382112830
Dimensions6.70 × 7.12 × 4.18 mm
L/W Ratio1.06
Culet sizeNone
Top View
6.70 mm7.12 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6382112830
Side View
Table 56.0%CrownGirdle: VTN-ETKPavilionCulet: NoneDepth 58.7%

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: £2,253 GBP|Low: £1,915 GBP|High: £3,930 GBP|Avg: £2,595 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 3£1,952 GBP
Retailer 7£2,131 GBP
Retailer 1£2,253 GBP
Retailer 8£2,471 GBP
Retailer 6£2,551 GBP
Retailer 2£2,770 GBP
Retailer 4£2,904 GBP
Retailer 5£3,873 GBP

38 data points across 8 retailers

20 retailers£1,755 GBP to £4,145 GBP

B+
Cheapest Retailer
-
£1,755 GBP
B+
Retailer 2
-
£1,952 GBP
View
B+
Retailer 3
-
£1,961 GBP
View
B
Retailer 4
-
£2,031 GBP
View
B
Retailer 5
-
£2,069 GBP
View
B
Retailer 6
-
£2,069 GBP
View
B
Retailer 7
-
£2,131 GBP
View
B
Retailer 8
-
£2,137 GBP
View
B
Retailer 9
-
£2,253 GBP
View
B
Retailer 10
-
£2,309 GBP
View
B
Retailer 11
-
£2,380 GBP
View
Retailer 12
-
£2,380 GBP
View
Price last confirmed 9 days ago
B
Retailer 13
-
£2,471 GBP
View
B
Retailer 14
-
£2,486 GBP
View
Retailer 15
-
£2,551 GBP
View
Price last confirmed 34 days ago
B
Retailer 16
-
£2,745 GBP
View
B
Retailer 17
-
£2,770 GBP
View
B
Retailer 18
-
£2,904 GBP
View
B
Retailer 19
-
£3,873 GBP
View
Most Expensive
B
NZ Jewellers
08aad0d8-8048-47ea-b6a4-44e956ae65b9 · Nov 5
£4,145 GBP
$5,548 USD
View
19 more retailers have this diamond
Prices start from £1,755 GBPSave up to £2,390 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
£1,755 GBP