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Princess|Natural|GIA

1.21ct I SI2 Princess Natural Diamond

EX • I/SI2 • GIA 7558780158

Certificate GIA 7558780158

Diamond specifications and retailer prices

From £1,322 GBP
As of November 2, 2026
Save £1,022 GBP (44%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £3,297 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.21ct natural princess diamond

This 1.21ct natural princess sits in the classic one-carat band, graded I 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 7558780158. Listed at 5 retailers as of November 2, 2026, with a 77% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle49.42°
Pavilion angle37.78°
OriginNatural
Grading LabGIA
CertificateGIA 7558780158
Dimensions5.82 × 5.60 × 4.18 mm
L/W Ratio1.04
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
5.82 mm5.60 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7558780158
Side View
Table 72.0%Crown 49.42°GirdlePavilion 37.78°Culet: NoneDepth 74.6%

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 2
Current: £1,322 GBP|Low: £1,322 GBP|High: £2,397 GBP|Avg: £1,629 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 1£1,322 GBP
Retailer 3£1,352 GBP
Retailer 5£1,363 GBP
Retailer 4£1,691 GBP
Retailer 2£2,344 GBP

28 data points across 5 retailers

5 retailers£1,322 GBP to £2,344 GBP

A
Cheapest Retailer
-
£1,322 GBP
Retailer 2
-
£1,352 GBP
View
Price last confirmed 42 days ago
A
Retailer 3
-
£1,352 GBP
View
B+
Retailer 4
-
£2,344 GBP
View
Most Expensive
NZ Jewellers
42325d82-50ca-4ea0-a872-e8df653dc4a0 · Sep 28
£3,297 GBP
$4,413 USD
View
Price last confirmed 39 days ago
4 more retailers have this diamond
Prices start from £1,322 GBPSave up to £1,022 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 Princess
£1,322 GBP