Heart|Natural|GIA

1.21ct D SI1 Heart Natural Diamond

VG • D/SI1 • GIA 6542139244

Certificate GIA 6542139244

Diamond specifications and retailer prices

From £1,608 GBP
As of November 6, 2026
Save £1,992 GBP (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £4,513 GBP at NZ Jewellers · As of September 25, 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6542139244. Listed at 16 retailers as of November 4, 2026, with a 124% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
D
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6542139244
Dimensions6.43 × 7.26 × 4.15 mm
L/W Ratio1.13
Top View
6.43 mm7.26 mm1.21 ctD / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6542139244
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 57.2%

Caratlytics Score

How it works →
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: £1,608 GBP|Low: £1,509 GBP|High: £3,715 GBP|Avg: £2,205 GBP|+0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 1£1,608 GBP
Retailer 3£1,711 GBP
Retailer 9£1,909 GBP
Retailer 4£1,934 GBP
Retailer 13£2,069 GBP
Retailer 11£2,111 GBP
Retailer 12£2,264 GBP
Retailer 6£2,285 GBP
Retailer 10£2,308 GBP
Retailer 5£2,347 GBP
Retailer 2£2,465 GBP
Retailer 7£2,634 GBP
Retailer 8£3,600 GBP

39 data points across 13 retailers

16 retailers£1,608 GBP to £3,600 GBP

A
Cheapest Retailer
-
£1,608 GBP
A
Retailer 2
-
£1,711 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,909 GBP
View
B+
Retailer 4
-
£1,934 GBP
View
B+
Retailer 5
-
£2,069 GBP
View
B+
Retailer 6
-
£2,111 GBP
View
Retailer 7
-
£2,158 GBP
View
Price last confirmed 42 days ago
B+
Retailer 8
-
£2,264 GBP
View
B+
Retailer 9
-
£2,285 GBP
View
B+
Retailer 10
-
£2,308 GBP
View
Retailer 11
-
£2,347 GBP
View
Price last confirmed 30 days ago
B
Retailer 12
-
£2,465 GBP
View
Retailer 13
-
£2,490 GBP
View
Price last confirmed 43 days ago
B+
Retailer 14
-
£2,634 GBP
View
B
Retailer 15
-
£3,600 GBP
View
Most Expensive
NZ Jewellers
c27b58b6-618b-44f8-bf85-af67dd7fc74f · Sep 25
£4,513 GBP
$6,040 USD
View
Price last confirmed 42 days ago
15 more retailers have this diamond
Prices start from £1,608 GBPSave up to £1,992 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
£1,608 GBP