Radiant|Natural|GIA

1.20ct H SI1 Radiant Natural Diamond

ID • H/SI1 • GIA 2556740785

Certificate GIA 2556740785

Diamond specifications and retailer prices

From £2,332 GBP
As of November 1, 2026
Save £2,516 GBP (52%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £5,051 GBP at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

About this 1.2ct natural radiant diamond

This 1.2ct natural radiant 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 2556740785. Listed at 27 retailers as of November 1, 2026, with a 108% 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
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle51.66°
Pavilion angle35.15°
OriginNatural
Grading LabGIA
CertificateGIA 2556740785
Dimensions7.33 × 5.18 × 3.51 mm
L/W Ratio1.42
Girdle conditionThick
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
7.33 mm5.18 mm1.20 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556740785
Side View
Table 72.0%Crown 51.66°Girdle: STK-THKPavilion 35.15°Culet: NoneDepth 67.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £5,051 GBP|Low: £2,222 GBP|High: £5,051 GBP|Avg: £3,070 GBP
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 5
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Retailer 22
Retailer 23
Retailer 24
Retailer 25
Retailer 26
November 3, 2026
Retailer 14£2,332 GBP
Retailer 22£2,372 GBP
Retailer 11£2,424 GBP
Retailer 12£2,439 GBP
Retailer 10£2,467 GBP
Retailer 24£2,529 GBP
Retailer 3£2,627 GBP
Retailer 26£2,627 GBP
Retailer 16£2,631 GBP
Retailer 7£2,705 GBP
Retailer 5£2,728 GBP
Retailer 19£2,809 GBP
Retailer 20£2,828 GBP
Retailer 6£2,861 GBP
Retailer 9£2,861 GBP
Retailer 8£2,951 GBP
Retailer 2£2,965 GBP
Retailer 4£3,031 GBP
Retailer 15£3,106 GBP
Retailer 17£3,116 GBP
Retailer 21£3,281 GBP
Retailer 18£3,282 GBP
Retailer 23£3,564 GBP
Retailer 13£4,848 GBP
Retailer 25£4,967 GBP
NZ Jewellers£5,051 GBP

23 data points across 26 retailers

27 retailers£2,332 GBP to £4,848 GBP

B+
Cheapest Retailer
-
£2,332 GBP
B+
Retailer 2
-
£2,372 GBP
View
B+
Retailer 3
-
£2,439 GBP
View
B+
Retailer 4
-
£2,467 GBP
View
B+
Retailer 5
-
£2,529 GBP
View
Retailer 6
-
£2,627 GBP
View
Price last confirmed 9 days ago
B+
Retailer 7
-
£2,627 GBP
View
Retailer 8
-
£2,627 GBP
View
Price last confirmed 16 days ago
B+
Retailer 9
-
£2,631 GBP
View
B+
Retailer 10
-
£2,705 GBP
View
B+
Retailer 11
-
£2,728 GBP
View
B+
Retailer 12
-
£2,828 GBP
View
B
Retailer 13
-
£2,861 GBP
View
B
Retailer 14
-
£2,861 GBP
View
B
Retailer 15
-
£2,951 GBP
View
B
Retailer 16
-
£2,965 GBP
View
B
Retailer 17
-
£3,031 GBP
View
Retailer 18
-
£3,031 GBP
View
Price last confirmed 17 days ago
Retailer 19
-
£3,106 GBP
View
Price last confirmed 30 days ago
B
Retailer 20
-
£3,116 GBP
View
B
Retailer 21
-
£3,281 GBP
View
Retailer 22
-
£3,282 GBP
View
Price last confirmed 25 days ago
B
Retailer 23
-
£3,564 GBP
View
B
Retailer 24
-
£4,848 GBP
View
Retailer 25
-
£4,967 GBP
View
Price last confirmed 10 days ago
Retailer 26
-
£5,051 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
08ea702e-d102-4fa3-8078-23c675ad2a1a · Oct 21
£5,051 GBP
$6,761 USD
View
Price last confirmed 16 days ago
26 more retailers have this diamond
Prices start from £2,332 GBPSave up to £2,516 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 Radiant
£2,332 GBP