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Princess|Natural|GIA

1.21ct J SI2 Princess Natural Diamond

ID • J/SI2 • GIA 4

Certificate GIA 4

Diamond specifications and retailer prices

From £2,353 GBP
As of November 4, 2026
Save £607 GBP (21%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £2,960 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 3 retailers as of November 4, 2026, with prices from £2,353 to £2,960, a £607 spread on the same certified stone. Blue Nile lists it at £2,960. 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 4
Dimensions6.03 × 5.84 × 4.06 mm
L/W Ratio1.03
Top View
6.03 mm5.84 mm1.21 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 4
Side View
Table 70.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 69.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 4
Current: £2,960 GBP|Low: £2,353 GBP|High: £2,960 GBP|Avg: £2,480 GBP
Blue Nile
Retailer 2
Retailer 3
September 26, 2026
Retailer 3£2,353 GBP
Retailer 2£2,367 GBP
Blue Nile£2,960 GBP

2 data points across 3 retailers

3 retailers£2,353 GBP to £2,960 GBP

B
Cheapest Retailer
-
£2,353 GBP
B
Retailer 2
-
£2,367 GBP
View
Most Expensive
B
Blue Nile
17346607 · Nov 5
£2,960 GBP
$3,962 USD
View
2 more retailers have this diamond
Prices start from £2,353 GBPSave up to £607 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
£2,353 GBP