Radiant|Natural|GIA

1.21ct J SI1 Radiant Natural Diamond

VG • J/SI1 • GIA 6525798141

Certificate GIA 6525798141

Diamond specifications and retailer prices

From £1,490 GBP
As of November 6, 2026
Save £2,779 GBP (65%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £4,270 GBP at NZ Jewellers · As of November 3, 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6525798141. Listed at 22 retailers as of November 3, 2026, with prices from £1,490 to £4,270, a £2,779 spread on the same certified stone. NZ Jewellers lists it at £4,270. 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
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6525798141
Dimensions6.90 × 5.31 × 3.69 mm
L/W Ratio1.30
Top View
6.90 mm5.31 mm1.21 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6525798141
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.5%

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 6
Current: £1,711 GBP|Low: £1,490 GBP|High: £3,615 GBP|Avg: £2,159 GBP
Retailer 1
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
November 7, 2026
Retailer 13£1,490 GBP
Retailer 12£1,542 GBP
Retailer 6£1,621 GBP
Retailer 15£1,646 GBP
Retailer 1£1,711 GBP
Retailer 8£1,768 GBP
Retailer 2£1,833 GBP
Retailer 3£1,935 GBP
Retailer 4£1,951 GBP
Retailer 11£1,993 GBP
Retailer 5£2,170 GBP
Retailer 9£2,200 GBP
Retailer 7£2,288 GBP
Retailer 10£2,299 GBP
Retailer 14£3,291 GBP

35 data points across 15 retailers

22 retailers£1,490 GBP to £4,270 GBP

B+
Cheapest Retailer
-
£1,490 GBP
Final sale: no returns
B+
Retailer 2
-
£1,542 GBP
View
Retailer 3
-
£1,621 GBP
View
Price last confirmed 10 days ago
B+
Retailer 4
-
£1,646 GBP
View
B+
Retailer 5
-
£1,711 GBP
View
B+
Retailer 6
-
£1,712 GBP
View
B+
Retailer 7
-
£1,768 GBP
View
B+
Retailer 8
-
£1,833 GBP
View
Retailer 9
-
£1,850 GBP
View
Price last confirmed 9 days ago
B
Retailer 10
-
£1,850 GBP
View
B
Retailer 11
-
£1,935 GBP
View
B
Retailer 12
-
£1,951 GBP
View
B
Retailer 13
-
£1,980 GBP
View
B
Retailer 14
-
£1,993 GBP
View
B
Retailer 15
-
£2,070 GBP
View
B
Retailer 16
-
£2,170 GBP
View
B
Retailer 17
-
£2,182 GBP
View
B
Retailer 18
-
£2,200 GBP
View
Retailer 19
-
£2,288 GBP
View
Price last confirmed 31 days ago
B
Retailer 20
-
£2,299 GBP
View
B
Retailer 21
-
£3,291 GBP
View
Most Expensive
C
NZ Jewellers
ef327437-041a-4ea7-baf5-0a98e040ef0d · Nov 3
£4,270 GBP
$5,715 USD
View
21 more retailers have this diamond
Prices start from £1,490 GBPSave up to £2,779 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
£1,490 GBP