Radiant|Natural|GIA

1.20ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 3555645736

Certificate GIA 3555645736

Diamond specifications and retailer prices

From £1,713 GBP
As of November 7, 2026
18 retailers carry this diamond
Most expensive: £3,454 GBP at NZ Jewellers · As of September 20, 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 J 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 3555645736. Listed at 18 retailers as of November 7, 2026. 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
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555645736
Dimensions7.33 × 5.23 × 3.50 mm
L/W Ratio1.40
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Indented Natural, Cloud, Needle, Natural
Top View
7.33 mm5.23 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555645736
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.9%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 7
Current: £3,372 GBP|Low: £1,269 GBP|High: £3,372 GBP|Avg: £1,818 GBP
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 24
October 22, 2026
Retailer 24£1,309 GBP
Retailer 3£1,364 GBP
Retailer 20£1,390 GBP
Retailer 12£1,485 GBP
Retailer 9£1,495 GBP
Retailer 10£1,554 GBP
Retailer 7£1,594 GBP
Retailer 8£1,613 GBP
Retailer 11£1,613 GBP
Retailer 22£1,625 GBP
Retailer 23£1,696 GBP
Retailer 15£1,716 GBP
Retailer 21£1,724 GBP
Retailer 14£1,861 GBP
Retailer 4£1,890 GBP
Retailer 5£1,996 GBP
Retailer 17£2,020 GBP
Retailer 16£2,031 GBP
Retailer 2£2,043 GBP
Retailer 13£2,144 GBP
Retailer 18£2,144 GBP
Retailer 19£2,219 GBP
Retailer 6£2,852 GBP
NZ Jewellers£3,372 GBP

20 data points across 24 retailers

18 retailers

Retailer 1
-
£1,485 GBP
Price last confirmed 31 days ago
Retailer 2
-
£1,613 GBP
View
Price last confirmed 30 days ago
Retailer 3
-
£1,613 GBP
View
Price last confirmed 31 days ago
Retailer 4
-
£1,652 GBP
View
Price last confirmed 43 days ago
Retailer 5
-
£1,696 GBP
View
Price last confirmed 30 days ago
B+
Retailer 6
-
£1,713 GBP
View
Retailer 7
-
£1,728 GBP
View
Price last confirmed 38 days ago
Retailer 8
-
£1,861 GBP
View
Price last confirmed 31 days ago
Retailer 9
-
£1,906 GBP
View
Price last confirmed 46 days ago
Retailer 10
-
£2,020 GBP
View
Price last confirmed 34 days ago
Retailer 11
-
£2,031 GBP
View
Price last confirmed 32 days ago
Retailer 12
-
£2,043 GBP
View
Price last confirmed 8 days ago
Retailer 13
-
£2,144 GBP
View
Price last confirmed 9 days ago
Retailer 14
-
£2,144 GBP
View
Price last confirmed 10 days ago
Retailer 15
-
£2,219 GBP
View
Price last confirmed 10 days ago
Retailer 16
-
£2,852 GBP
View
Price last confirmed 30 days ago
Retailer 17
-
£3,372 GBP
View
Price last confirmed 32 days ago
Most Expensive
NZ Jewellers
22cc3872-e67f-46b2-a85a-2e58662edd0e · Sep 20
£3,454 GBP
$4,623 USD
View
Price last confirmed 47 days ago
17 more retailers have this diamond
Prices start from £1,713 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
£1,713 GBP