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Heart|Natural|GIA

1.21ct D SI1 Heart Natural Diamond

GD • D/SI1 • GIA 2203906541

Certificate GIA 2203906541

Diamond specifications and retailer prices

From £2,678 GBP
As of November 6, 2026
Save £2,847 GBP (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,525 GBP at MOH London · As of November 4, 2026
View at MOH London

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2203906541. Listed at 19 retailers as of November 4, 2026, with prices from £2,678 to £5,525, a £2,847 spread on the same certified stone. MOH London lists it at £5,525. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2203906541
Dimensions6.42 × 5.69 × 3.79 mm
L/W Ratio1.13
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.42 mm5.69 mm1.21 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2203906541
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.6%

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: £5,525 GBP|Low: £2,287 GBP|High: £5,607 GBP|Avg: £3,488 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 10£2,678 GBP
Retailer 6£2,744 GBP
Retailer 5£2,773 GBP
Retailer 7£2,908 GBP
Retailer 9£3,151 GBP
Retailer 3£3,404 GBP
Retailer 8£3,506 GBP
Retailer 2£3,700 GBP
Retailer 4£4,244 GBP
MOH London£5,525 GBP

46 data points across 10 retailers

19 retailers£2,678 GBP to £5,525 GBP

B+
Cheapest Retailer
-
£2,678 GBP
B+
Retailer 2
-
£2,717 GBP
View
B+
Retailer 3
-
£2,744 GBP
View
B
Retailer 4
-
£2,773 GBP
View
B
Retailer 5
-
£2,779 GBP
View
B
Retailer 6
-
£2,908 GBP
View
Final sale: no returns
B
Retailer 7
-
£2,996 GBP
View
B
Retailer 8
-
£3,137 GBP
View
Retailer 9
-
£3,151 GBP
View
Price last confirmed 8 days ago
B
Retailer 10
-
£3,202 GBP
View
Retailer 11
-
£3,216 GBP
View
Price last confirmed 14 days ago
B
Retailer 12
-
£3,346 GBP
View
B
Retailer 13
-
£3,404 GBP
View
Retailer 14
-
£3,506 GBP
View
Price last confirmed 28 days ago
B
Retailer 15
-
£3,628 GBP
View
B
Retailer 16
-
£3,700 GBP
View
B
Retailer 17
-
£4,244 GBP
View
C
Retailer 18
-
£5,031 GBP
View
Most Expensive
B
MOH London
134D3AFB4 · Nov 4
£5,525 GBP
View
18 more retailers have this diamond
Prices start from £2,678 GBPSave up to £2,847 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
£2,678 GBP