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Radiant|Natural|GIA

1.21ct F SI1 Radiant Natural Diamond

EX • F/SI1 • GIA 3515698616

Certificate GIA 3515698616

Diamond specifications and retailer prices

From £3,120 GBP
As of November 5, 2026
Save £3,485 GBP (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £6,605 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 3515698616. Listed at 19 retailers as of November 5, 2026, with prices from £3,120 to £6,605, a £3,485 spread on the same certified stone. NZ Jewellers lists it at £6,605. 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 angle32.8°
OriginNatural
Grading LabGIA
CertificateGIA 3515698616
Dimensions7.18 × 5.31 × 3.52 mm
L/W Ratio1.35
Girdle conditionPolished
Top View
7.18 mm5.31 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3515698616
Side View
Table 67.0%CrownGirdle: STK-THKPavilion 32.8°Culet: NDepth 66.3%

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: £6,605 GBP|Low: £3,330 GBP|High: £6,605 GBP|Avg: £4,334 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
November 7, 2026
Retailer 3£3,330 GBP
Retailer 5£3,373 GBP
Retailer 4£3,578 GBP
Retailer 12£3,578 GBP
Retailer 13£3,578 GBP
Retailer 8£3,903 GBP
Retailer 11£3,981 GBP
Retailer 6£4,202 GBP
Retailer 9£4,445 GBP
Retailer 10£4,818 GBP
Retailer 2£4,940 GBP
Retailer 7£6,256 GBP
NZ Jewellers£6,605 GBP

45 data points across 13 retailers

19 retailers£3,120 GBP to £6,605 GBP

B+
Cheapest Retailer
-
£3,120 GBP
B
Retailer 2
-
£3,330 GBP
View
B
Retailer 3
-
£3,373 GBP
View
B
Retailer 4
-
£3,379 GBP
View
B
Retailer 5
-
£3,578 GBP
View
B
Retailer 6
-
£3,578 GBP
View
Retailer 7
-
£3,578 GBP
View
Price last confirmed 9 days ago
B
Retailer 8
-
£3,898 GBP
View
B
Retailer 9
-
£3,903 GBP
View
Retailer 10
-
£3,981 GBP
View
Price last confirmed 29 days ago
B
Retailer 11
-
£4,129 GBP
View
Retailer 12
-
£4,202 GBP
View
Retailer 13
-
£4,359 GBP
View
Price last confirmed 15 days ago
B
Retailer 14
-
£4,445 GBP
View
B
Retailer 15
-
£4,457 GBP
View
B
Retailer 16
-
£4,818 GBP
View
Retailer 17
-
£4,940 GBP
View
B
Retailer 18
-
£6,256 GBP
View
Most Expensive
B
NZ Jewellers
e84a75b7-a070-4130-8530-22d294cb9c05 · Nov 5
£6,605 GBP
$8,841 USD
View
18 more retailers have this diamond
Prices start from £3,120 GBPSave up to £3,485 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
£3,120 GBP