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Radiant|Natural|GIA

1.21ct J SI2 Radiant Natural Diamond

GD • J/SI2 • GIA 1232629984

Certificate GIA 1232629984

Diamond specifications and retailer prices

From £1,849 GBP
$2,477 USD
As of October 31, 2026
Save £2,350 GBP (56%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £4,199 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1232629984. Listed at 26 retailers as of October 30, 2026, with prices from £1,849 to £4,199, a £2,350 spread on the same certified stone. NZ Jewellers lists it at £4,199. 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

1.21
Carat
J
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1232629984
Dimensions7.00 × 5.38 × 3.69 mm
L/W Ratio1.30
Culet sizeNone
Top View
7.00 mm5.38 mm1.21 ctJ / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1232629984
Side View
Table 66.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £4,199 GBP|Low: £1,865 GBP|High: £4,199 GBP|Avg: £2,596 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
October 31, 2026
Retailer 14£1,890 GBP
Retailer 11£1,913 GBP
Retailer 10£1,985 GBP
Retailer 4£2,051 GBP
Retailer 15£2,183 GBP
Retailer 7£2,204 GBP
Retailer 12£2,267 GBP
Retailer 13£2,358 GBP
Retailer 2£2,518 GBP
Retailer 3£2,519 GBP
Retailer 5£2,796 GBP
Retailer 8£2,821 GBP
Retailer 6£2,868 GBP
Retailer 9£4,052 GBP
NZ Jewellers£4,199 GBP

41 data points across 15 retailers

26 retailers£1,849 GBP to £4,199 GBP

B
Cheapest Retailer
-
£1,849 GBP
$2,477 USD
B
Retailer 2
-
£1,890 GBP
$2,533 USD
View
B
Retailer 3
-
£1,913 GBP
$2,563 USD
View
Final sale: no returns
B
Retailer 4
-
£1,931 GBP
$2,587 USD
View
B
Retailer 5
-
£1,955 GBP
$2,620 USD
View
B
Retailer 6
-
£1,985 GBP
$2,660 USD
View
B
Retailer 7
-
£2,051 GBP
$2,748 USD
View
B
Retailer 8
-
£2,183 GBP
$2,925 USD
View
B
Retailer 9
-
£2,183 GBP
$2,925 USD
View
B
Retailer 10
-
£2,204 GBP
$2,954 USD
View
B
Retailer 11
-
£2,230 GBP
CA$4,150 CAD
View
B
Retailer 12
-
£2,267 GBP
$3,038 USD
View
B
Retailer 13
-
£2,358 GBP
$3,159 USD
View
B
Retailer 14
-
£2,370 GBP
$3,176 USD
View
B
Retailer 15
-
£2,370 GBP
$3,176 USD
View
B
Retailer 16
-
£2,485 GBP
$3,330 USD
View
B
Retailer 17
-
£2,485 GBP
$3,330 USD
View
B
Retailer 18
-
£2,516 GBP
$3,371 USD
View
B
Retailer 19
-
£2,518 GBP
View
B
Retailer 20
-
£2,519 GBP
$3,375 USD
View
B
Retailer 21
-
£2,567 GBP
$3,440 USD
View
B
Retailer 22
-
£2,821 GBP
€3,600 EUR
View
C
Retailer 23
-
£2,829 GBP
$3,790 USD
View
C
Retailer 24
-
£3,477 GBP
$4,659 USD
View
C
Retailer 25
-
£4,052 GBP
View
Most Expensive
C
NZ Jewellers
492b037e-cac6-4a9d-b7e1-86a8037870a3 · Oct 30
£4,199 GBP
$5,626 USD
View
25 more retailers have this diamond
Prices start from £1,849 GBPSave up to £2,350 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
£1,849 GBP