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Princess|Natural|GIA

1.20ct I SI2 Princess Natural Diamond

EX • I/SI2 • GIA 2566368960

Certificate GIA 2566368960

Diamond specifications and retailer prices

From £1,171 GBP
As of November 6, 2026
Save £928 GBP (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,099 GBP at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.2ct natural princess diamond

This 1.2ct 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 2566368960. Listed at 14 retailers as of November 6, 2026, with prices from £1,171 to £2,099, a £928 spread on the same certified stone. Helzberg Diamonds lists it at £2,099. 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

1.20
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.79°
Pavilion angle37.51°
OriginNatural
Grading LabGIA
CertificateGIA 2566368960
Dimensions5.74 × 5.63 × 4.12 mm
L/W Ratio1.02
Culet sizeNone
Top View
5.74 mm5.63 mm1.20 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566368960
Side View
Table 72.0%Crown 30.79°Girdle: STK-THKPavilion 37.51°Culet: NDepth 73.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,099 GBP|Low: £1,171 GBP|High: £2,319 GBP|Avg: £1,498 GBP|-9.5%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 2£1,171 GBP
Retailer 13£1,171 GBP
Retailer 10£1,181 GBP
Retailer 6£1,214 GBP
Retailer 5£1,275 GBP
Retailer 11£1,298 GBP
Retailer 7£1,320 GBP
Retailer 12£1,330 GBP
Retailer 3£1,411 GBP
Retailer 4£1,557 GBP
Retailer 9£1,642 GBP
Retailer 8£1,652 GBP
Retailer 14£1,946 GBP
Helzberg Diamonds£2,099 GBP

20 data points across 14 retailers

14 retailers£1,171 GBP to £2,099 GBP

A
Cheapest Retailer
-
£1,171 GBP
A
Retailer 2
-
£1,171 GBP
View
A
Retailer 3
-
£1,181 GBP
View
A
Retailer 4
-
£1,214 GBP
View
A
Retailer 5
-
£1,275 GBP
View
A
Retailer 6
-
£1,298 GBP
View
A
Retailer 7
-
£1,320 GBP
View
A
Retailer 8
-
£1,330 GBP
View
A
Retailer 9
-
£1,411 GBP
View
A
Retailer 10
-
£1,557 GBP
View
B+
Retailer 11
-
£1,642 GBP
View
B+
Retailer 12
-
£1,652 GBP
View
B+
Retailer 13
-
£1,946 GBP
View
Most Expensive
B+
Helzberg Diamonds
XZRILMMJMOPMG · Nov 6
£2,099 GBP
$2,809 USD
View
13 more retailers have this diamond
Prices start from £1,171 GBPSave up to £928 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
1.20ct Princess
£1,171 GBP