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Heart|Natural|GIA

1.20ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 7442234987

Certificate GIA 7442234987

Diamond specifications and retailer prices

From £1,546 GBP
As of November 6, 2026
Save £559 GBP (27%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,014 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7442234987. Listed at 11 retailers as of November 6, 2026, with a 36% 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7442234987
Dimensions6.25 × 5.75 × 3.96 mm
L/W Ratio1.09
Top View
6.25 mm5.75 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 7442234987
Side View
Table 61.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 68.8%

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: £3,014 GBP|Low: £1,287 GBP|High: £3,034 GBP|Avg: £1,985 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 2£1,564 GBP
Retailer 7£1,660 GBP
Retailer 5£1,714 GBP
Retailer 8£1,715 GBP
Retailer 4£2,088 GBP
Retailer 3£2,105 GBP
Retailer 6£2,107 GBP
MOH London£3,014 GBP

45 data points across 8 retailers

11 retailers£1,546 GBP to £2,105 GBP

B+
Cheapest Retailer
-
£1,546 GBP
B+
Retailer 2
-
£1,564 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,660 GBP
View
B+
Retailer 4
-
£1,714 GBP
View
B
Retailer 5
-
£1,715 GBP
View
B
Retailer 6
-
£1,727 GBP
View
B
Retailer 7
-
£1,815 GBP
View
B
Retailer 8
-
£2,088 GBP
View
B
Retailer 9
-
£2,105 GBP
View
Retailer 10
-
£2,107 GBP
View
Price last confirmed 31 days ago
Most Expensive
MOH London
CFEA340F3 · Oct 29
£3,014 GBP
View
Price last confirmed 8 days ago
10 more retailers have this diamond
Prices start from £1,546 GBPSave up to £559 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+
1.20ct Heart
£1,546 GBP