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Radiant|Natural|GIA

1.20ct F SI1 Radiant Natural Diamond

EX • F/SI1 • GIA 5556393129

Certificate GIA 5556393129

Diamond specifications and retailer prices

From £2,425 GBP
As of November 4, 2026
Save £2,334 GBP (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,759 GBP at NZ Jewellers · As of November 5, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5556393129. Listed at 19 retailers as of November 4, 2026, with prices from £2,425 to £4,759, a £2,334 spread on the same certified stone. NZ Jewellers lists it at £4,759. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.2°
OriginNatural
Grading LabGIA
CertificateGIA 5556393129
Dimensions7.49 × 5.26 × 3.65 mm
L/W Ratio1.42
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud
Top View
7.49 mm5.26 mm1.20 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556393129
Side View
Table 70.0%Crown 42.2°Girdle: ThickPavilionCulet: NoneDepth 69.4%

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 4
Current: £4,759 GBP|Low: £2,362 GBP|High: £5,042 GBP|Avg: £3,095 GBP|-5.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 7, 2026
Retailer 5£2,425 GBP
Retailer 14£2,495 GBP
Retailer 7£2,521 GBP
Retailer 9£2,622 GBP
Retailer 11£2,667 GBP
Retailer 3£2,731 GBP
Retailer 10£2,731 GBP
Retailer 13£2,826 GBP
Retailer 8£2,837 GBP
Retailer 4£2,840 GBP
Retailer 18£2,910 GBP
Retailer 6£2,968 GBP
Retailer 17£3,151 GBP
Retailer 15£3,180 GBP
Retailer 16£3,334 GBP
Retailer 2£3,488 GBP
Retailer 12£4,544 GBP
NZ Jewellers£4,759 GBP

24 data points across 18 retailers

19 retailers£2,425 GBP to £4,759 GBP

B+
Cheapest Retailer
-
£2,425 GBP
B+
Retailer 2
-
£2,495 GBP
View
B+
Retailer 3
-
£2,521 GBP
View
Final sale: no returns
B+
Retailer 4
-
£2,622 GBP
View
B+
Retailer 5
-
£2,667 GBP
View
B+
Retailer 6
-
£2,731 GBP
View
Retailer 7
-
£2,731 GBP
View
Price last confirmed 9 days ago
B+
Retailer 8
-
£2,826 GBP
View
B+
Retailer 9
-
£2,837 GBP
View
B+
Retailer 10
-
£2,840 GBP
View
B+
Retailer 11
-
£2,910 GBP
View
B+
Retailer 12
-
£2,968 GBP
View
Retailer 13
-
£3,041 GBP
View
Price last confirmed 30 days ago
B+
Retailer 14
-
£3,151 GBP
View
B+
Retailer 15
-
£3,180 GBP
View
B+
Retailer 16
-
£3,334 GBP
View
Retailer 17
-
£3,488 GBP
View
B
Retailer 18
-
£4,544 GBP
View
Most Expensive
B
NZ Jewellers
92481498-3960-449d-88fe-049ad514a65a · Nov 5
£4,759 GBP
$6,370 USD
View
18 more retailers have this diamond
Prices start from £2,425 GBPSave up to £2,334 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
£2,425 GBP