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Heart|Natural|GIA

1.20ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6247051045

Certificate GIA 6247051045

Diamond specifications and retailer prices

From £1,479 GBP
As of November 5, 2026
Save £2,128 GBP (59%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,606 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 6247051045. Listed at 6 retailers as of November 5, 2026, with prices from £1,479 to £3,606, a £2,128 spread on the same certified stone. NZ Jewellers lists it at £3,606. 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
FluorescenceMedium
Pavilion angle38.34°
OriginNatural
Grading LabGIA
CertificateGIA 6247051045
Dimensions6.61 × 7.21 × 4.32 mm
L/W Ratio1.09
Key to symbols
Twinning Wisp, Crystal, Feather
Top View
6.61 mm7.21 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6247051045
Side View
Table 60.0%CrownGirdle: THK-VTKPavilion 38.34°CuletDepth 60.0%

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 5
Current: £3,606 GBP|Low: £1,479 GBP|High: £3,635 GBP|Avg: £2,399 GBP|-0.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 4, 2026
Retailer 6£1,479 GBP
Retailer 5£1,547 GBP
Retailer 4£1,745 GBP
Retailer 3£2,259 GBP
Retailer 2£2,584 GBP
NZ Jewellers£3,606 GBP

26 data points across 6 retailers

6 retailers£1,479 GBP to £3,606 GBP

A
Cheapest Retailer
-
£1,479 GBP
A
Retailer 2
-
£1,547 GBP
View
B+
Retailer 3
-
£1,745 GBP
View
B+
Retailer 4
-
£2,259 GBP
View
B+
Retailer 5
-
£2,584 GBP
View
Most Expensive
B
NZ Jewellers
8e1df945-76d9-4943-91bb-11abc9b194d6 · Nov 5
£3,606 GBP
$4,827 USD
View
5 more retailers have this diamond
Prices start from £1,479 GBPSave up to £2,128 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
£1,479 GBP