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Heart|Natural|GIA

1.20ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 6555455676

Certificate GIA 6555455676

Diamond specifications and retailer prices

From £1,635 GBP
As of November 6, 2026
Save £2,911 GBP (64%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £4,545 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded H 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 6555455676. Listed at 25 retailers as of November 5, 2026, with prices from £1,635 to £4,545, a £2,911 spread on the same certified stone. NZ Jewellers lists it at £4,545. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555455676
Dimensions6.73 × 7.43 × 4.26 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
6.73 mm7.43 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555455676
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 57.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,545 GBP|Low: £1,635 GBP|High: £4,571 GBP|Avg: £2,680 GBP|-0.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 7£1,635 GBP
Retailer 2£1,706 GBP
Retailer 17£1,930 GBP
Retailer 18£1,951 GBP
Retailer 9£2,007 GBP
Retailer 12£2,109 GBP
Retailer 3£2,174 GBP
Retailer 11£2,186 GBP
Retailer 5£2,258 GBP
Retailer 14£2,276 GBP
Retailer 8£2,280 GBP
Retailer 15£2,301 GBP
Retailer 4£2,352 GBP
Retailer 6£2,509 GBP
Retailer 13£2,530 GBP
Retailer 16£2,654 GBP
Retailer 19£3,626 GBP
Retailer 10£4,383 GBP
NZ Jewellers£4,545 GBP

22 data points across 19 retailers

25 retailers£1,635 GBP to £4,545 GBP

A
Cheapest Retailer
-
£1,635 GBP
A
Retailer 2
-
£1,706 GBP
View
B+
Retailer 3
-
£1,930 GBP
View
B+
Retailer 4
-
£1,951 GBP
View
B+
Retailer 5
-
£2,007 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,016 GBP
View
B+
Retailer 7
-
£2,049 GBP
View
B+
Retailer 8
-
£2,051 GBP
View
B+
Retailer 9
-
£2,109 GBP
View
B+
Retailer 10
-
£2,174 GBP
View
Retailer 11
-
£2,186 GBP
View
Price last confirmed 9 days ago
Retailer 12
-
£2,186 GBP
View
Price last confirmed 22 days ago
B+
Retailer 13
-
£2,258 GBP
View
B+
Retailer 14
-
£2,276 GBP
View
B+
Retailer 15
-
£2,280 GBP
View
B+
Retailer 16
-
£2,286 GBP
View
B+
Retailer 17
-
£2,301 GBP
View
B+
Retailer 18
-
£2,352 GBP
View
Retailer 19
-
£2,462 GBP
View
Price last confirmed 31 days ago
B+
Retailer 20
-
£2,509 GBP
View
B
Retailer 21
-
£2,530 GBP
View
B
Retailer 22
-
£2,654 GBP
View
B
Retailer 23
-
£3,626 GBP
View
Retailer 24
-
£4,383 GBP
View
Price last confirmed 10 days ago
Most Expensive
B
NZ Jewellers
6391fe8e-3615-4d57-b729-822588072907 · Nov 5
£4,545 GBP
$6,084 USD
View
24 more retailers have this diamond
Prices start from £1,635 GBPSave up to £2,911 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
1.20ct Heart
£1,635 GBP