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Princess|Natural|IGI

1.21ct J SI1 Princess Natural Diamond

GD • J/SI1 • IGI 450023233

Shape and cutting style on the report: Princess cut

Certificate IGI 450023233

Diamond specifications and retailer prices

From £919 GBP
As of November 1, 2026
Save £1,079 GBP (54%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,998 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural princess diamond

This 1.21ct natural princess sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI 450023233. Listed at 4 retailers as of November 1, 2026, with prices from £919 to £1,998, a £1,079 spread on the same certified stone. MOH London lists it at £1,998. 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
Good
Cut

Specifications

CutGood
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabIGI
CertificateIGI 450023233
Dimensions5.81 × 5.68 × 4.41 mm
L/W Ratio1.02
Culet sizeNone
Top View
5.81 mm5.68 mm1.21 ctJ / SI1
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceNone
CertificateIGI 450023233
Side View
Table 79.5%CrownGirdle: MED-THKPavilionCulet: NoneDepth 77.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 1
Current: £1,998 GBP|Low: £919 GBP|High: £2,406 GBP|Avg: £1,572 GBP|-16.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4£919 GBP
Retailer 3£1,284 GBP
Retailer 2£1,477 GBP
MOH London£1,998 GBP

41 data points across 4 retailers

4 retailers£919 GBP to £1,998 GBP

B+
Cheapest Retailer
-
£919 GBP
B
Retailer 2
-
£1,284 GBP
View
B
Retailer 3
-
£1,477 GBP
View
Most Expensive
C
MOH London
D96C8C3E5 · Nov 4
£1,998 GBP
View
3 more retailers have this diamond
Prices start from £919 GBPSave up to £1,079 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 Princess
£919 GBP