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Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 7541433747

Certificate GIA 7541433747

Diamond specifications and retailer prices

From £1,464 GBP
As of November 5, 2026
Save £1,891 GBP (56%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,355 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7541433747. Listed at 11 retailers as of November 5, 2026, with prices from £1,464 to £3,355, a £1,891 spread on the same certified stone. NZ Jewellers lists it at £3,355. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 7541433747
Dimensions6.80 × 6.76 × 4.22 mm
L/W Ratio1.01
Star length50%
Culet sizeNone
Key to symbols
Cloud, Crystal, Needle
Top View
6.80 mm6.76 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7541433747
Side View
Table 59.0%Crown 35.5°GirdlePavilion 41°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £3,355 GBP|Low: £1,357 GBP|High: £3,892 GBP|Avg: £2,092 GBP|-13.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10£1,464 GBP
Retailer 7£1,481 GBP
Retailer 2£1,514 GBP
Retailer 3£1,605 GBP
Retailer 8£1,679 GBP
Retailer 4£1,845 GBP
Retailer 9£1,851 GBP
Retailer 5£2,174 GBP
Retailer 6£2,803 GBP
Retailer 11£2,908 GBP
NZ Jewellers£3,355 GBP

44 data points across 11 retailers

11 retailers£1,464 GBP to £3,355 GBP

A
Cheapest Retailer
-
£1,464 GBP
A
Retailer 2
-
£1,481 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,514 GBP
View
B+
Retailer 4
-
£1,605 GBP
View
B+
Retailer 5
-
£1,679 GBP
View
B+
Retailer 6
-
£1,845 GBP
View
B+
Retailer 7
-
£1,851 GBP
View
B
Retailer 8
-
£2,174 GBP
View
B
Retailer 9
-
£2,803 GBP
View
B
Retailer 10
-
£2,908 GBP
View
Most Expensive
B
NZ Jewellers
8dbac2f0-1cc8-43ae-bf97-1e4325459bfa · Nov 5
£3,355 GBP
$4,490 USD
View
10 more retailers have this diamond
Prices start from £1,464 GBPSave up to £1,891 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.

A
1.21ct Round
£1,464 GBP