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Heart|Natural|GIA

1.21ct H SI2 Heart Natural Diamond

EX • H/SI2 • GIA 1539635227

Certificate GIA 1539635227

Diamond specifications and retailer prices

From £1,484 GBP
SGD 2,687 SGD
As of October 31, 2026
Save £1,925 GBP (56%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,409 GBP at NZ Jewellers · As of October 30, 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 1539635227. Listed at 7 retailers as of October 30, 2026, with prices from £1,484 to £3,409, a £1,925 spread on the same certified stone. NZ Jewellers lists it at £3,409. 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
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1539635227
Dimensions7.39 × 6.43 × 3.73 mm
L/W Ratio1.15
Key to symbols
Twinning Wisp, Crystal, Cloud, Feather, Needle, Indented Natural
Top View
7.39 mm6.43 mm1.21 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1539635227
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.0%

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: Oct 31
Current: £3,409 GBP|Low: £1,378 GBP|High: £3,829 GBP|Avg: £2,048 GBP|-2.4%
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 1, 2026
Retailer 6£1,484 GBP
Retailer 4£1,597 GBP
Retailer 9£1,690 GBP
Retailer 8£1,706 GBP
Retailer 2£1,711 GBP
Retailer 3£1,767 GBP
Retailer 7£1,776 GBP
Retailer 10£1,853 GBP
Retailer 12£1,858 GBP
Retailer 11£2,145 GBP
Retailer 5£2,857 GBP
NZ Jewellers£3,409 GBP

30 data points across 12 retailers

7 retailers£1,484 GBP to £3,409 GBP

A
Cheapest Retailer
-
£1,484 GBP
SGD 2,687 SGD
B+
Retailer 2
-
£1,690 GBP
$2,265 USD
View
Final sale: no returns
B+
Retailer 3
-
£1,706 GBP
$2,286 USD
View
B+
Retailer 4
-
£1,711 GBP
$2,293 USD
View
B+
Retailer 5
-
£1,776 GBP
$2,380 USD
View
B
Retailer 6
-
£2,857 GBP
View
Most Expensive
B
NZ Jewellers
b68ae1d6-3e41-4c83-a5b7-b706b500f6f1 · Oct 30
£3,409 GBP
$4,568 USD
View
6 more retailers have this diamond
Prices start from £1,484 GBPSave up to £1,925 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
£1,484 GBP