CaratHunter
Plans
Radiant|Natural|GIA

1.21ct F SI1 Radiant Natural Diamond

EX • F/SI1 • GIA 5526904201

Certificate GIA 5526904201

Diamond specifications and retailer prices

From £3,174 GBP
As of November 5, 2026
Save £3,545 GBP (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £6,720 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct 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 5526904201. Listed at 20 retailers as of November 5, 2026, with prices from £3,174 to £6,720, a £3,545 spread on the same certified stone. NZ Jewellers lists it at £6,720. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle33.5°
OriginNatural
Grading LabGIA
CertificateGIA 5526904201
Dimensions7.12 × 5.27 × 3.52 mm
L/W Ratio1.35
Girdle conditionPolished
Top View
7.12 mm5.27 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5526904201
Side View
Table 66.0%CrownGirdle: STK-THKPavilion 33.5°Culet: NDepth 66.7%

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 5
Current: £6,720 GBP|Low: £2,800 GBP|High: £6,720 GBP|Avg: £4,317 GBP
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
November 7, 2026
Retailer 12£3,174 GBP
Retailer 13£3,361 GBP
Retailer 6£3,429 GBP
Retailer 3£3,640 GBP
Retailer 4£3,640 GBP
Retailer 5£3,640 GBP
Retailer 9£3,881 GBP
Retailer 14£4,050 GBP
Retailer 7£4,274 GBP
Retailer 10£4,521 GBP
Retailer 11£4,902 GBP
Retailer 2£5,023 GBP
Retailer 8£6,365 GBP
NZ Jewellers£6,720 GBP

45 data points across 14 retailers

20 retailers£3,174 GBP to £6,720 GBP

B+
Cheapest Retailer
-
£3,174 GBP
B
Retailer 2
-
£3,361 GBP
View
Final sale: no returns
B
Retailer 3
-
£3,388 GBP
View
B
Retailer 4
-
£3,411 GBP
View
B
Retailer 5
-
£3,429 GBP
View
B
Retailer 6
-
£3,640 GBP
View
B
Retailer 7
-
£3,640 GBP
View
Retailer 8
-
£3,640 GBP
View
Price last confirmed 9 days ago
B
Retailer 9
-
£3,881 GBP
View
B
Retailer 10
-
£3,966 GBP
View
Retailer 11
-
£4,050 GBP
View
Price last confirmed 29 days ago
B
Retailer 12
-
£4,200 GBP
View
Retailer 13
-
£4,274 GBP
View
Retailer 14
-
£4,434 GBP
View
Price last confirmed 15 days ago
B
Retailer 15
-
£4,521 GBP
View
B
Retailer 16
-
£4,535 GBP
View
B
Retailer 17
-
£4,902 GBP
View
Retailer 18
-
£5,023 GBP
View
B
Retailer 19
-
£6,365 GBP
View
Most Expensive
B
NZ Jewellers
3c3d90cd-a52c-4c09-96da-7034f867374f · Nov 5
£6,720 GBP
$8,994 USD
View
19 more retailers have this diamond
Prices start from £3,174 GBPSave up to £3,545 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+
1.21ct Radiant
£3,174 GBP