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Heart|Natural|GIA

1.21ct D SI2 Heart Natural Diamond

EX • D/SI2 • GIA 5513714880

Certificate GIA 5513714880

Diamond specifications and retailer prices

From £1,586 GBP
As of November 6, 2026
Save £1,957 GBP (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,200 GBP at NZ Jewellers · As of October 21, 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5513714880. Listed at 15 retailers as of November 4, 2026, with a 123% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5513714880
Dimensions7.41 × 6.28 × 4.48 mm
L/W Ratio1.18
Top View
7.41 mm6.28 mm1.21 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 5513714880
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 60.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,200 GBP|Low: £1,400 GBP|High: £4,200 GBP|Avg: £2,336 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 10£1,586 GBP
Retailer 9£1,680 GBP
Retailer 2£1,789 GBP
Retailer 6£1,820 GBP
Retailer 8£1,904 GBP
Retailer 3£1,994 GBP
Retailer 7£2,100 GBP
Retailer 4£2,519 GBP
Retailer 5£3,544 GBP
NZ Jewellers£4,200 GBP

40 data points across 10 retailers

15 retailers£1,586 GBP to £3,544 GBP

A
Cheapest Retailer
-
£1,586 GBP
A
Retailer 2
-
£1,652 GBP
View
A
Retailer 3
-
£1,680 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,789 GBP
View
Retailer 5
-
£1,820 GBP
View
Price last confirmed 15 days ago
Retailer 6
-
£1,904 GBP
View
Price last confirmed 15 days ago
B+
Retailer 7
-
£1,928 GBP
View
B+
Retailer 8
-
£1,994 GBP
View
Retailer 9
-
£2,100 GBP
View
Price last confirmed 14 days ago
B+
Retailer 10
-
£2,107 GBP
View
B+
Retailer 11
-
£2,107 GBP
View
B+
Retailer 12
-
£2,182 GBP
View
B+
Retailer 13
-
£2,519 GBP
View
B
Retailer 14
-
£3,544 GBP
View
Most Expensive
NZ Jewellers
ff0732ba-771a-4a5c-ba29-80f813082d9a · Oct 21
£4,200 GBP
$5,622 USD
View
Price last confirmed 16 days ago
14 more retailers have this diamond
Prices start from £1,586 GBPSave up to £1,957 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
1.21ct Heart
£1,586 GBP