CaratHunter
Plans
Radiant|Natural|GIA

1.21ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 2231483721

Certificate GIA 2231483721

Diamond specifications and retailer prices

From £2,166 GBP
$2,906 USD
As of November 2, 2026
Save £2,385 GBP (52%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,550 GBP at NZ Jewellers · As of October 30, 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 I 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 2231483721. Listed at 15 retailers as of October 30, 2026, with prices from £2,166 to £4,550, a £2,385 spread on the same certified stone. NZ Jewellers lists it at £4,550. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2231483721
Dimensions6.94 × 5.28 × 3.69 mm
L/W Ratio1.31
Culet sizeNone
Top View
6.94 mm5.28 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2231483721
Side View
Table 68.0%CrownGirdle: VTK-VTKPavilionCulet: NoneDepth 70.0%

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 2
Current: £4,550 GBP|Low: £2,166 GBP|High: £4,550 GBP|Avg: £2,881 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
Retailer 15
Retailer 16
November 2, 2026
Retailer 3£2,166 GBP
Retailer 13£2,366 GBP
Retailer 15£2,366 GBP
Retailer 4£2,380 GBP
Retailer 14£2,457 GBP
Retailer 6£2,477 GBP
Retailer 5£2,590 GBP
Retailer 9£2,730 GBP
Retailer 12£2,730 GBP
Retailer 7£2,753 GBP
Retailer 16£2,960 GBP
Retailer 8£2,972 GBP
Retailer 2£3,057 GBP
Retailer 11£3,210 GBP
Retailer 10£4,368 GBP
NZ Jewellers£4,550 GBP

18 data points across 16 retailers

15 retailers£2,166 GBP to £4,550 GBP

B+
Cheapest Retailer
-
£2,166 GBP
$2,906 USD
B+
Retailer 2
-
£2,366 GBP
$3,175 USD
View
B+
Retailer 3
-
£2,366 GBP
$3,175 USD
View
B
Retailer 4
-
£2,380 GBP
$3,194 USD
View
B
Retailer 5
-
£2,457 GBP
$3,297 USD
View
B
Retailer 6
-
£2,477 GBP
$3,324 USD
View
B+
Retailer 7
-
£2,590 GBP
CA$4,827 CAD
View
B
Retailer 8
-
£2,730 GBP
View
B
Retailer 9
-
£2,730 GBP
$3,664 USD
View
B
Retailer 10
-
£2,753 GBP
$3,694 USD
View
Retailer 11
-
£2,960 GBP
$3,972 USD
View
Price last confirmed 10 days ago
B
Retailer 12
-
£3,057 GBP
€3,907 EUR
View
B
Retailer 13
-
£3,210 GBP
ZAR 69,598 ZAR
View
B
Retailer 14
-
£4,368 GBP
View
Most Expensive
B
NZ Jewellers
304b2cca-abd9-424a-9469-a079e08a804e · Oct 30
£4,550 GBP
$6,106 USD
View
14 more retailers have this diamond
Prices start from £2,166 GBPSave up to £2,385 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
£2,166 GBP