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Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

GD • J/SI1 • GIA 5376670316

Certificate GIA 5376670316

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)
17 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 5376670316. Listed at 17 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. 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
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5376670316
Dimensions7.23 × 6.54 × 4.05 mm
L/W Ratio1.11
Top View
7.23 mm6.54 mm1.20 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5376670316
Side View
Table 60.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 56.1%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
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: £2,539 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3£1,952 GBP
Retailer 9£2,131 GBP
Retailer 7£2,143 GBP
Retailer 6£2,148 GBP
Retailer 1£2,253 GBP
Retailer 8£2,551 GBP
Retailer 2£2,770 GBP
Retailer 4£2,904 GBP
Retailer 5£3,873 GBP

37 data points across 9 retailers

17 retailers£1,755 GBP to £4,145 GBP

B
Cheapest Retailer
-
£1,755 GBP
B
Retailer 2
-
£1,952 GBP
View
B
Retailer 3
-
£2,131 GBP
View
B
Retailer 4
-
£2,143 GBP
View
B
Retailer 5
-
£2,148 GBP
View
B
Retailer 6
-
£2,253 GBP
View
B
Retailer 7
-
£2,309 GBP
View
Retailer 8
-
£2,380 GBP
View
Price last confirmed 9 days ago
B
Retailer 9
-
£2,380 GBP
View
B
Retailer 10
-
£2,471 GBP
View
B
Retailer 11
-
£2,486 GBP
View
Retailer 12
-
£2,551 GBP
View
Price last confirmed 34 days ago
C
Retailer 13
-
£2,745 GBP
View
B
Retailer 14
-
£2,770 GBP
View
B
Retailer 15
-
£2,904 GBP
View
C
Retailer 16
-
£3,873 GBP
View
Most Expensive
C
NZ Jewellers
c66b0f12-fa59-4932-96c8-93ffe99f7b90 · Nov 5
£4,145 GBP
$5,548 USD
View
16 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