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Round|Natural|IGI

1.21ct M IF Round Natural Diamond

EX • M/IF • IGI 523201890

Shape and cutting style on the report: Round brilliant

Certificate IGI 523201890

Diamond specifications and retailer prices

From £1,114 GBP
As of November 6, 2026
Save £1,892 GBP (63%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,005 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 M colour (faint-tinted) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI 523201890. Listed at 11 retailers as of November 5, 2026, with prices from £1,114 to £3,005, a £1,892 spread on the same certified stone. NZ Jewellers lists it at £3,005. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
M
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.4°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 523201890
Dimensions6.78 × 6.81 × 4.21 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT Minor graining
Top View
6.78 mm6.81 mm1.21 ctM / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 523201890
Side View
Table 58.5%Crown 35.4°GirdlePavilion 40.9°Culet: NoneDepth 62.0%

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 6
Current: £3,005 GBP|Low: £1,113 GBP|High: £3,005 GBP|Avg: £1,515 GBP
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 2£1,114 GBP
Retailer 6£1,232 GBP
Retailer 10£1,232 GBP
Retailer 3£1,285 GBP
Retailer 8£1,289 GBP
Retailer 11£1,333 GBP
Retailer 9£1,422 GBP
Retailer 5£1,504 GBP
Retailer 4£1,670 GBP
Retailer 7£1,755 GBP
NZ Jewellers£3,005 GBP

37 data points across 11 retailers

11 retailers£1,114 GBP to £3,005 GBP

A
Cheapest Retailer
-
£1,114 GBP
A
Retailer 2
-
£1,142 GBP
View
A
Retailer 3
-
£1,232 GBP
View
A
Retailer 4
-
£1,285 GBP
View
A
Retailer 5
-
£1,289 GBP
View
A
Retailer 6
-
£1,333 GBP
View
A
Retailer 7
-
£1,422 GBP
View
A
Retailer 8
-
£1,504 GBP
View
A
Retailer 9
-
£1,670 GBP
View
B+
Retailer 10
-
£1,755 GBP
View
Most Expensive
B
NZ Jewellers
c7801b19-7fbf-4829-a097-3a750cf755c2 · Nov 5
£3,005 GBP
$4,045 USD
View
10 more retailers have this diamond
Prices start from £1,114 GBPSave up to £1,892 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
£1,114 GBP