CaratHunter
Plans
Heart|Natural|GIA

1.21ct H SI2 Heart Natural Diamond

EX • H/SI2 • GIA 6552581364

Certificate GIA 6552581364

Diamond specifications and retailer prices

From £1,232 GBP
HK$12,900 HKD
As of November 1, 2026
Save £1,779 GBP (59%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,910 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552581364. Listed at 12 retailers as of October 29, 2026, with a 144% 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

1.21
Carat
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552581364
Dimensions6.47 × 7.29 × 4.23 mm
L/W Ratio1.13
Girdle conditionFaceted
Top View
6.47 mm7.29 mm1.21 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552581364
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 57.9%

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 1
Current: £2,717 GBP|Low: £1,232 GBP|High: £3,316 GBP|Avg: £1,914 GBP|+1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7£1,232 GBP
Retailer 5£1,364 GBP
Retailer 3£1,420 GBP
Retailer 10£1,480 GBP
Retailer 8£1,508 GBP
Retailer 6£1,575 GBP
Retailer 4£1,647 GBP
Retailer 2£2,556 GBP
Retailer 1£2,717 GBP
Retailer 9£3,011 GBP

40 data points across 10 retailers

12 retailers£1,232 GBP to £3,011 GBP

A
Cheapest Retailer
-
£1,232 GBP
HK$12,900 HKD
A
Retailer 2
-
£1,364 GBP
$1,827 USD
View
A
Retailer 3
-
£1,420 GBP
$1,903 USD
View
Final sale: no returns
A
Retailer 4
-
£1,480 GBP
$1,983 USD
View
A
Retailer 5
-
£1,508 GBP
$2,021 USD
View
A
Retailer 6
-
£1,575 GBP
$2,110 USD
View
B+
Retailer 7
-
£1,647 GBP
View
B+
Retailer 8
-
£1,896 GBP
A$3,908 AUD
View
B
Retailer 9
-
£2,556 GBP
$3,425 USD
View
B
Retailer 10
-
£2,717 GBP
$3,640 USD
View
B
Retailer 11
-
£3,011 GBP
View
Most Expensive
NZ Jewellers
6173e6b6-e200-4ca0-9bfb-b2af4827b16b · Sep 25
£3,910 GBP
$5,239 USD
View
Price last confirmed 37 days ago
11 more retailers have this diamond
Prices start from £1,232 GBPSave up to £1,779 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
1.21ct Heart
£1,232 GBP