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Heart|Natural|GIA

1.21ct J SI2 Heart Natural Diamond

EX • J/SI2 • GIA 1419696942

Certificate GIA 1419696942

Diamond specifications and retailer prices

From £1,794 GBP
As of November 6, 2026
Save £2,519 GBP (58%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,312 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct 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 1419696942. Listed at 18 retailers as of November 5, 2026, with prices from £1,794 to £4,312, a £2,519 spread on the same certified stone. NZ Jewellers lists it at £4,312. 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

1.21
Carat
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1419696942
Dimensions6.68 × 6.97 × 4.12 mm
L/W Ratio1.04
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Needle, Indented Natural
Top View
6.68 mm6.97 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1419696942
Side View
Table 59.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 59.1%

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: £2,561 GBP|Low: £1,794 GBP|High: £4,190 GBP|Avg: £2,634 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 2£1,794 GBP
Retailer 8£1,817 GBP
Retailer 7£2,243 GBP
Retailer 9£2,285 GBP
Retailer 3£2,466 GBP
Retailer 5£2,532 GBP
Retailer 1£2,561 GBP
Retailer 4£2,882 GBP
Retailer 6£4,128 GBP

29 data points across 9 retailers

18 retailers£1,794 GBP to £4,312 GBP

B+
Cheapest Retailer
-
£1,794 GBP
B+
Retailer 2
-
£1,817 GBP
View
B
Retailer 3
-
£2,114 GBP
View
B
Retailer 4
-
£2,243 GBP
View
B
Retailer 5
-
£2,285 GBP
View
Final sale: no returns
B
Retailer 6
-
£2,466 GBP
View
Retailer 7
-
£2,475 GBP
View
Price last confirmed 9 days ago
B
Retailer 8
-
£2,475 GBP
View
B
Retailer 9
-
£2,532 GBP
View
B
Retailer 10
-
£2,561 GBP
View
B
Retailer 11
-
£2,571 GBP
View
B
Retailer 12
-
£2,583 GBP
View
B
Retailer 13
-
£2,649 GBP
View
B
Retailer 14
-
£2,856 GBP
View
B
Retailer 15
-
£2,882 GBP
View
B
Retailer 16
-
£3,025 GBP
View
B
Retailer 17
-
£4,128 GBP
View
Most Expensive
B
NZ Jewellers
829fc394-96e8-45d4-8f62-a4f1fc867efa · Nov 5
£4,312 GBP
$5,772 USD
View
17 more retailers have this diamond
Prices start from £1,794 GBPSave up to £2,519 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+
1.21ct Heart
£1,794 GBP