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Heart|Natural|GIA

1.20ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6552305670

Certificate GIA 6552305670

Diamond specifications and retailer prices

From £2,300 GBP
As of November 4, 2026
Save £1,989 GBP (46%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,480 GBP at NZ Jewellers · As of October 18, 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 G 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 6552305670. Listed at 11 retailers as of November 4, 2026, with a 86% 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552305670
Dimensions6.22 × 7.33 × 4.39 mm
L/W Ratio1.18
Girdle conditionFaceted
Top View
6.22 mm7.33 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552305670
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 59.8%

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 4
Current: £2,686 GBP|Low: £1,898 GBP|High: £4,604 GBP|Avg: £2,833 GBP|-3.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11£2,278 GBP
Retailer 10£2,300 GBP
Retailer 7£2,403 GBP
Retailer 8£2,555 GBP
Retailer 9£2,555 GBP
Retailer 2£2,675 GBP
Retailer 3£2,675 GBP
Retailer 1£2,686 GBP
Retailer 12£2,764 GBP
Retailer 4£2,963 GBP
Retailer 6£3,748 GBP
Retailer 5£4,288 GBP

35 data points across 12 retailers

11 retailers£2,300 GBP to £4,288 GBP

B+
Cheapest Retailer
-
£2,300 GBP
B+
Retailer 2
-
£2,403 GBP
View
B+
Retailer 3
-
£2,555 GBP
View
B+
Retailer 4
-
£2,555 GBP
View
B+
Retailer 5
-
£2,675 GBP
View
B+
Retailer 6
-
£2,675 GBP
View
B+
Retailer 7
-
£2,686 GBP
View
B
Retailer 8
-
£2,764 GBP
View
B
Retailer 9
-
£3,748 GBP
View
B
Retailer 10
-
£4,288 GBP
View
Most Expensive
NZ Jewellers
c7a55978-bc63-45bf-ae7f-3894078b182b · Oct 18
£4,480 GBP
$5,996 USD
View
Price last confirmed 20 days ago
10 more retailers have this diamond
Prices start from £2,300 GBPSave up to £1,989 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
£2,300 GBP