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Radiant|Natural|GIA

1.20ct J SI2 Radiant Natural Diamond

VG • J/SI2 • GIA 1558394082

Certificate GIA 1558394082

Diamond specifications and retailer prices

From £1,443 GBP
$1,933 USD
As of October 30, 2026
Save £1,896 GBP (57%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,338 GBP at NZ Jewellers · As of October 30, 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 SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1558394082. Listed at 12 retailers as of October 30, 2026, with prices from £1,443 to £3,338, a £1,896 spread on the same certified stone. NZ Jewellers lists it at £3,338. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
J
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558394082
Dimensions6.85 × 5.22 × 3.63 mm
L/W Ratio1.31
Key to symbols
Twinning Wisp, Feather, Crystal
Top View
6.85 mm5.22 mm1.20 ctJ / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558394082
Side View
Table 66.0%CrownGirdlePavilionCulet: NoneDepth 69.5%

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: Oct 30
Current: £3,338 GBP|Low: £1,378 GBP|High: £3,476 GBP|Avg: £1,947 GBP|-4.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 10£1,443 GBP
Retailer 11£1,473 GBP
Retailer 12£1,572 GBP
Retailer 4£1,577 GBP
Retailer 7£1,597 GBP
Retailer 9£1,597 GBP
Retailer 3£1,670 GBP
Retailer 5£1,752 GBP
Retailer 8£1,843 GBP
Retailer 2£2,181 GBP
Retailer 6£2,802 GBP
NZ Jewellers£3,338 GBP

40 data points across 12 retailers

12 retailers£1,443 GBP to £3,338 GBP

B+
Cheapest Retailer
-
£1,443 GBP
$1,933 USD
B+
Retailer 2
-
£1,473 GBP
$1,974 USD
View
Final sale: no returns
B+
Retailer 3
-
£1,572 GBP
$2,106 USD
View
B+
Retailer 4
-
£1,577 GBP
$2,113 USD
View
B+
Retailer 5
-
£1,597 GBP
$2,140 USD
View
B+
Retailer 6
-
£1,597 GBP
$2,140 USD
View
B+
Retailer 7
-
£1,670 GBP
$2,238 USD
View
B
Retailer 8
-
£1,752 GBP
View
B
Retailer 9
-
£1,843 GBP
$2,469 USD
View
B
Retailer 10
-
£2,181 GBP
€2,783 EUR
View
B
Retailer 11
-
£2,802 GBP
View
Most Expensive
C
NZ Jewellers
7b1abb6f-6574-47ae-b48d-66644d2c540c · Oct 30
£3,338 GBP
$4,473 USD
View
11 more retailers have this diamond
Prices start from £1,443 GBPSave up to £1,896 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
£1,443 GBP