Princess|Natural|GIA

1.23ct G SI1 Princess Natural Diamond

ID • G/SI1 • GIA 103

Certificate GIA 103

Diamond specifications and retailer prices

From £2,368 GBP
As of November 1, 2026
Save £658 GBP (22%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,044 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 1.23ct natural princess diamond

This 1.23ct natural princess sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 14 retailers as of November 1, 2026, with a 28% 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

1.23
Carat
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 103
Dimensions5.89 × 5.82 × 4.27 mm
L/W Ratio1.01
Top View
5.89 mm5.82 mm1.23 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 103
Side View
Table 72.0%CrownGirdle: Slightly Thick to ThickPavilionCulet: NDepth 73.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £5,044 GBP|Low: £1,765 GBP|High: £5,044 GBP|Avg: £2,790 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9£1,765 GBP
Retailer 5£2,368 GBP
Retailer 8£2,382 GBP
Retailer 3£2,623 GBP
Retailer 6£2,623 GBP
Retailer 2£2,724 GBP
Retailer 7£2,807 GBP
Retailer 4£3,027 GBP
NZ Jewellers£5,044 GBP

11 data points across 9 retailers

14 retailers£2,368 GBP to £3,027 GBP

B+
Cheapest Retailer
-
£2,368 GBP
B+
Retailer 2
-
£2,382 GBP
View
B+
Retailer 3
-
£2,623 GBP
View
Retailer 4
-
£2,623 GBP
View
Price last confirmed 9 days ago
Retailer 5
-
£2,623 GBP
View
Price last confirmed 9 days ago
Retailer 6
-
£2,623 GBP
View
Price last confirmed 30 days ago
Retailer 7
-
£2,724 GBP
View
Price last confirmed 9 days ago
Retailer 8
-
£2,724 GBP
View
B
Retailer 9
-
£2,807 GBP
View
Retailer 10
-
£3,027 GBP
View
Price last confirmed 29 days ago
Retailer 11
-
£3,027 GBP
View
Price last confirmed 11 days ago
B
Retailer 12
-
£3,027 GBP
View
Retailer 13
-
£5,044 GBP
View
Price last confirmed 35 days ago
Most Expensive
NZ Jewellers
a1731493-114a-4aec-8b28-045a197b09a4 · Oct 27
£5,044 GBP
$6,751 USD
View
Price last confirmed 11 days ago
13 more retailers have this diamond
Prices start from £2,368 GBPSave up to £658 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+
1.23ct Princess
£2,368 GBP