Heart|Natural|GIA

1.20ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6545346217

Certificate GIA 6545346217

Diamond specifications and retailer prices

From £1,214 GBP
As of November 6, 2026
Save £1,588 GBP (57%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £3,558 GBP at NZ Jewellers · As of October 6, 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 6545346217. Listed at 22 retailers as of November 4, 2026, with a 131% 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
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6545346217
Dimensions6.56 × 7.55 × 4.33 mm
L/W Ratio1.15
Top View
6.56 mm7.55 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6545346217
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 57.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,282 GBP|Low: £1,204 GBP|High: £3,018 GBP|Avg: £1,674 GBP|-8.8%
Retailer 1
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
November 6, 2026
Retailer 12£1,214 GBP
Retailer 1£1,282 GBP
Retailer 5£1,479 GBP
Retailer 14£1,518 GBP
Retailer 6£1,532 GBP
Retailer 2£1,543 GBP
Retailer 10£1,550 GBP
Retailer 7£1,555 GBP
Retailer 13£1,603 GBP
Retailer 3£1,681 GBP
Retailer 4£1,690 GBP
Retailer 8£1,742 GBP
Retailer 9£1,957 GBP
Retailer 11£2,802 GBP

27 data points across 14 retailers

22 retailers£1,214 GBP to £2,802 GBP

A
Cheapest Retailer
-
£1,214 GBP
A
Retailer 2
-
£1,282 GBP
View
A
Retailer 3
-
£1,479 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,518 GBP
View
A
Retailer 5
-
£1,532 GBP
View
A
Retailer 6
-
£1,543 GBP
View
A
Retailer 7
-
£1,550 GBP
View
A
Retailer 8
-
£1,555 GBP
View
Retailer 9
-
£1,603 GBP
View
Price last confirmed 9 days ago
B+
Retailer 10
-
£1,659 GBP
View
A
Retailer 11
-
£1,681 GBP
View
A
Retailer 12
-
£1,690 GBP
View
Retailer 13
-
£1,702 GBP
View
Price last confirmed 26 days ago
Retailer 14
-
£1,702 GBP
View
Price last confirmed 31 days ago
B+
Retailer 15
-
£1,742 GBP
View
Retailer 16
-
£1,833 GBP
View
Price last confirmed 37 days ago
B+
Retailer 17
-
£1,873 GBP
View
B+
Retailer 18
-
£1,957 GBP
View
Retailer 19
-
£1,964 GBP
View
Price last confirmed 29 days ago
Retailer 20
-
£2,093 GBP
View
Price last confirmed 32 days ago
B
Retailer 21
-
£2,802 GBP
View
Most Expensive
NZ Jewellers
2edcbfdd-1395-45a7-afdd-932752c2ff52 · Oct 6
£3,558 GBP
$4,763 USD
View
Price last confirmed 31 days ago
21 more retailers have this diamond
Prices start from £1,214 GBPSave up to £1,588 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
£1,214 GBP