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Heart|Natural|GIA

1.20ct G SI1 Heart Natural Diamond

ID • G/SI1 • GIA 6541270102

Certificate GIA 6541270102

Diamond specifications and retailer prices

From £1,390 GBP
As of November 6, 2026
Save £1,908 GBP (58%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,298 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 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 6541270102. Listed at 17 retailers as of November 5, 2026, with prices from £1,390 to £3,298, a £1,908 spread on the same certified stone. NZ Jewellers lists it at £3,298. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.92°
OriginNatural
Grading LabGIA
CertificateGIA 6541270102
Dimensions7.45 × 6.15 × 4.27 mm
L/W Ratio1.21
Top View
7.45 mm6.15 mm1.20 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6541270102
Side View
Table 65.0%Crown 34°Girdle: Extremely ThickPavilion 41.92°Culet: NoneDepth 57.4%

Caratlytics Score

How it works →
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: £3,298 GBP|Low: £1,390 GBP|High: £3,399 GBP|Avg: £1,886 GBP|-2.9%
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
November 6, 2026
Retailer 8£1,390 GBP
Retailer 6£1,456 GBP
Retailer 9£1,492 GBP
Retailer 5£1,559 GBP
Retailer 3£1,578 GBP
Retailer 15£1,595 GBP
Retailer 2£1,597 GBP
Retailer 7£1,626 GBP
Retailer 4£1,650 GBP
Retailer 11£1,671 GBP
Retailer 12£1,775 GBP
Retailer 13£1,925 GBP
Retailer 10£2,089 GBP
Retailer 14£2,756 GBP
NZ Jewellers£3,298 GBP

28 data points across 15 retailers

17 retailers£1,390 GBP to £3,298 GBP

A
Cheapest Retailer
-
£1,390 GBP
A
Retailer 2
-
£1,456 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,492 GBP
View
A
Retailer 4
-
£1,559 GBP
View
A
Retailer 5
-
£1,578 GBP
View
A
Retailer 6
-
£1,595 GBP
View
A
Retailer 7
-
£1,597 GBP
View
A
Retailer 8
-
£1,606 GBP
View
Retailer 9
-
£1,626 GBP
View
Price last confirmed 9 days ago
A
Retailer 10
-
£1,650 GBP
View
A
Retailer 11
-
£1,671 GBP
View
A
Retailer 12
-
£1,775 GBP
View
B+
Retailer 13
-
£1,925 GBP
View
Retailer 14
-
£1,999 GBP
View
Price last confirmed 32 days ago
B+
Retailer 15
-
£2,089 GBP
View
B
Retailer 16
-
£2,756 GBP
View
Most Expensive
B
NZ Jewellers
4380634e-7ea0-4409-b831-d3ffec60d129 · Nov 5
£3,298 GBP
$4,415 USD
View
16 more retailers have this diamond
Prices start from £1,390 GBPSave up to £1,908 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
£1,390 GBP