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Heart|Natural|GIA

1.20ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 6422701827

Certificate GIA 6422701827

Diamond specifications and retailer prices

From £1,061 GBP
As of November 6, 2026
Save £2,149 GBP (67%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,210 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 H 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 6422701827. Listed at 12 retailers as of November 5, 2026, with prices from £1,061 to £3,210, a £2,149 spread on the same certified stone. NZ Jewellers lists it at £3,210. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6422701827
Dimensions6.93 × 6.41 × 4.10 mm
L/W Ratio1.08
Top View
6.93 mm6.41 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6422701827
Side View
Table 57.0%CrownGirdle: THN-XTKPavilionCulet: NoneDepth 59.2%

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 6
Current: £3,210 GBP|Low: £975 GBP|High: £3,234 GBP|Avg: £1,582 GBP|-0.7%
NZ Jewellers
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 2£1,061 GBP
Retailer 11£1,210 GBP
Retailer 4£1,215 GBP
Retailer 5£1,277 GBP
Retailer 3£1,316 GBP
Retailer 10£1,377 GBP
Retailer 8£1,475 GBP
Retailer 7£1,479 GBP
Retailer 12£1,519 GBP
Retailer 6£1,787 GBP
Retailer 9£2,300 GBP
NZ Jewellers£3,210 GBP

33 data points across 12 retailers

12 retailers£1,061 GBP to £3,210 GBP

A
Cheapest Retailer
-
£1,061 GBP
A
Retailer 2
-
£1,210 GBP
View
A
Retailer 3
-
£1,215 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,277 GBP
View
A
Retailer 5
-
£1,316 GBP
View
A
Retailer 6
-
£1,377 GBP
View
A
Retailer 7
-
£1,475 GBP
View
B+
Retailer 8
-
£1,479 GBP
View
B+
Retailer 9
-
£1,519 GBP
View
B+
Retailer 10
-
£1,787 GBP
View
B+
Retailer 11
-
£2,300 GBP
View
Most Expensive
B
NZ Jewellers
39e87a42-5e5f-4e0f-b712-0a3b21b70841 · Nov 5
£3,210 GBP
$4,297 USD
View
11 more retailers have this diamond
Prices start from £1,061 GBPSave up to £2,149 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
£1,061 GBP