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Heart|Natural|HRD

1.21ct I SI1 Heart Natural Diamond

VG • I/SI1 • HRD 170002949845

Certificate HRD 170002949845

Diamond specifications and retailer prices

From £2,221 GBP
As of November 5, 2026
Save £1,917 GBP (46%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £4,138 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by HRD 170002949845. Listed at 4 retailers as of November 4, 2026, with prices from £2,221 to £4,138, a £1,917 spread on the same certified stone. MOH London lists it at £4,138. 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
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabHRD
CertificateHRD 170002949845
Dimensions6.74 × 7.20 × 3.44 mm
L/W Ratio1.07
Girdle conditionFaceted
Top View
6.74 mm7.20 mm1.21 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceMedium
CertificateHRD 170002949845
Side View
Table 65.0%CrownGirdle: Extremely ThickPavilionCulet: NoneDepth 47.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: £4,138 GBP|Low: £2,442 GBP|High: £4,199 GBP|Avg: £2,981 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4£2,442 GBP
Retailer 3£2,598 GBP
Retailer 2£2,722 GBP
MOH London£4,138 GBP

40 data points across 4 retailers

4 retailers£2,221 GBP to £4,138 GBP

B
Cheapest Retailer
-
£2,221 GBP
B
Retailer 2
-
£2,598 GBP
View
B
Retailer 3
-
£2,722 GBP
View
Most Expensive
C
MOH London
1F9D8CFE7 · Nov 4
£4,138 GBP
View
3 more retailers have this diamond
Prices start from £2,221 GBPSave up to £1,917 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
£2,221 GBP