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Heart|Natural|GIA

1.20ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 3415985694

Certificate GIA 3415985694

Diamond specifications and retailer prices

From £3,302 GBP
As of November 4, 2026
Save £1,796 GBP (35%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £6,637 GBP at MOH London · As of November 4, 2026
View at MOH London

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 3415985694. Listed at 19 retailers as of November 4, 2026, with a 54% 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
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 3415985694
Dimensions5.88 × 5.67 × 4.12 mm
L/W Ratio1.04
Top View
5.88 mm5.67 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 3415985694
Side View
Table 58.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 72.7%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £6,637 GBP|Low: £3,328 GBP|High: £6,736 GBP|Avg: £4,489 GBP|-1.2%
MOH London
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 8£3,328 GBP
Retailer 11£3,404 GBP
Retailer 12£3,493 GBP
Retailer 4£3,555 GBP
Retailer 10£3,786 GBP
Retailer 6£4,013 GBP
Retailer 2£4,054 GBP
Retailer 3£4,185 GBP
Retailer 5£4,702 GBP
Retailer 7£5,098 GBP
Retailer 9£6,020 GBP
MOH London£6,637 GBP

35 data points across 12 retailers

19 retailers£3,302 GBP to £5,098 GBP

B
Cheapest Retailer
-
£3,302 GBP
B
Retailer 2
-
£3,328 GBP
View
B
Retailer 3
-
£3,404 GBP
View
B
Retailer 4
-
£3,493 GBP
View
Final sale: no returns
B
Retailer 5
-
£3,555 GBP
View
B
Retailer 6
-
£3,560 GBP
View
B
Retailer 7
-
£3,749 GBP
View
Retailer 8
-
£3,786 GBP
View
Price last confirmed 9 days ago
B
Retailer 9
-
£4,013 GBP
View
B
Retailer 10
-
£4,054 GBP
View
B
Retailer 11
-
£4,079 GBP
View
B
Retailer 12
-
£4,079 GBP
View
Retailer 13
-
£4,185 GBP
View
Price last confirmed 29 days ago
B
Retailer 14
-
£4,214 GBP
View
Retailer 15
-
£4,610 GBP
View
Price last confirmed 23 days ago
B
Retailer 16
-
£4,702 GBP
View
B
Retailer 17
-
£5,098 GBP
View
Retailer 18
-
£6,020 GBP
View
Price last confirmed 10 days ago
Most Expensive
MOH London
8BE0C30AB · Nov 4
£6,637 GBP
View
Price under review
18 more retailers have this diamond
Prices start from £3,302 GBPSave up to £1,796 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
£3,302 GBP