CaratHunter
Plans
Cushion|Natural|GIA

1.20ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 3545423253

Certificate GIA 3545423253

Diamond specifications and retailer prices

From £1,722 GBP
As of November 6, 2026
Save £1,893 GBP (52%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,379 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.2ct natural cushion diamond

This 1.2ct natural cushion sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3545423253. Listed at 13 retailers as of November 4, 2026, with a 110% 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

1.20
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3545423253
Dimensions5.88 × 5.71 × 3.95 mm
L/W Ratio1.03
Top View
5.88 mm5.71 mm1.20 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3545423253
Side View
Table 68.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 69.1%

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 6
Current: £4,379 GBP|Low: £1,722 GBP|High: £4,393 GBP|Avg: £2,605 GBP|-0.3%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 6£1,722 GBP
Retailer 10£1,970 GBP
Retailer 4£2,001 GBP
Retailer 5£2,084 GBP
Retailer 7£2,103 GBP
Retailer 3£2,273 GBP
Retailer 2£2,300 GBP
Retailer 12£2,346 GBP
Retailer 8£2,523 GBP
Retailer 9£2,646 GBP
Retailer 11£3,615 GBP
Queensmith£4,379 GBP

24 data points across 12 retailers

13 retailers£1,722 GBP to £3,615 GBP

A
Cheapest Retailer
-
£1,722 GBP
A
Retailer 2
-
£1,970 GBP
View
B+
Retailer 3
-
£2,001 GBP
View
Final sale: no returns
B+
Retailer 4
-
£2,010 GBP
View
B+
Retailer 5
-
£2,084 GBP
View
B+
Retailer 6
-
£2,103 GBP
View
B+
Retailer 7
-
£2,273 GBP
View
B+
Retailer 8
-
£2,300 GBP
View
B+
Retailer 9
-
£2,346 GBP
View
B+
Retailer 10
-
£2,523 GBP
View
B+
Retailer 11
-
£2,646 GBP
View
B
Retailer 12
-
£3,615 GBP
View
Most Expensive
Queensmith
3545423253 · Oct 28
£4,379 GBP
View
Price last confirmed 9 days ago
12 more retailers have this diamond
Prices start from £1,722 GBPSave up to £1,893 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 Cushion
£1,722 GBP