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Heart|Natural|GIA

1.21ct J SI1 Heart Natural Diamond

VG • J/SI1 • GIA 2427292759

Certificate GIA 2427292759

Diamond specifications and retailer prices

From £1,434 GBP
As of November 6, 2026
Save £812 GBP (36%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £2,247 GBP at Yorxs · As of November 6, 2026
View at Yorxs

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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2427292759. Listed at 5 retailers as of November 6, 2026, with prices from £1,434 to £2,247, a £812 spread on the same certified stone. Yorxs lists it at £2,247. 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
J
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2427292759
Dimensions6.47 × 6.85 × 4.42 mm
L/W Ratio1.06
Top View
6.47 mm6.85 mm1.21 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2427292759
Side View
Table 66.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 64.6%

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: £1,990 GBP|Low: £1,385 GBP|High: £2,538 GBP|Avg: £1,887 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Yorxs
November 6, 2026
Retailer 2£1,434 GBP
Retailer 3£1,523 GBP
Retailer 8£1,601 GBP
Retailer 5£1,723 GBP
Retailer 4£1,756 GBP
Retailer 1£1,990 GBP
Retailer 6£2,211 GBP
Yorxs£2,247 GBP
Retailer 7£2,538 GBP

24 data points across 9 retailers

5 retailers£1,434 GBP to £2,247 GBP

B+
Cheapest Retailer
-
£1,434 GBP
B+
Retailer 2
-
£1,523 GBP
View
Final sale: no returns
B
Retailer 3
-
£1,756 GBP
View
B
Retailer 4
-
£1,990 GBP
View
Most Expensive
B
Yorxs
614052606 · Nov 6
£2,247 GBP
€2,864 EUR
View
4 more retailers have this diamond
Prices start from £1,434 GBPSave up to £812 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
£1,434 GBP