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Heart|Natural|GIA

1.20ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 1389765519

Certificate GIA 1389765519

Diamond specifications and retailer prices

From £1,492 GBP
As of November 6, 2026
Save £2,016 GBP (57%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £4,187 GBP at NZ Jewellers · As of September 25, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1389765519. Listed at 17 retailers as of November 2, 2026, with a 135% 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1389765519
Dimensions5.89 × 7.33 × 4.27 mm
L/W Ratio1.24
Key to symbols
Crystal, Feather, Needle, Natural
Top View
5.89 mm7.33 mm1.20 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1389765519
Side View
Table 53.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 58.2%

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: £1,492 GBP|Low: £1,492 GBP|High: £3,550 GBP|Avg: £2,122 GBP|-2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 1£1,492 GBP
Retailer 9£1,793 GBP
Retailer 7£1,848 GBP
Retailer 10£1,972 GBP
Retailer 11£1,977 GBP
Retailer 3£2,002 GBP
Retailer 2£2,079 GBP
Retailer 4£2,120 GBP
Retailer 8£2,244 GBP
Retailer 5£2,444 GBP
Retailer 6£3,508 GBP

42 data points across 11 retailers

17 retailers£1,492 GBP to £3,508 GBP

A
Cheapest Retailer
-
£1,492 GBP
A
Retailer 2
-
£1,793 GBP
View
A
Retailer 3
-
£1,848 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,972 GBP
View
Retailer 5
-
£2,002 GBP
View
Price last confirmed 45 days ago
Retailer 6
-
£2,002 GBP
View
Price last confirmed 29 days ago
Retailer 7
-
£2,002 GBP
View
Price last confirmed 21 days ago
Retailer 8
-
£2,079 GBP
View
Price last confirmed 36 days ago
B+
Retailer 9
-
£2,079 GBP
View
B+
Retailer 10
-
£2,120 GBP
View
Retailer 11
-
£2,244 GBP
View
Price last confirmed 30 days ago
Retailer 12
-
£2,311 GBP
View
Price last confirmed 43 days ago
Retailer 13
-
£2,311 GBP
View
Price last confirmed 28 days ago
B+
Retailer 14
-
£2,444 GBP
View
B
Retailer 15
-
£3,508 GBP
View
Retailer 16
-
£4,187 GBP
View
Price last confirmed 38 days ago
Most Expensive
NZ Jewellers
c35b72c8-90a7-44f4-8f03-679c14585fc2 · Sep 25
£4,187 GBP
$5,604 USD
View
Price last confirmed 42 days ago
16 more retailers have this diamond
Prices start from £1,492 GBPSave up to £2,016 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
£1,492 GBP