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Cushion|Natural|GIA

1.20ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 1559160548

Certificate GIA 1559160548

Diamond specifications and retailer prices

From £2,457 GBP
As of November 6, 2026
Save £2,661 GBP (52%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £5,261 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 D 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 1559160548. Listed at 20 retailers as of November 4, 2026, with a 108% 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1559160548
Dimensions8.04 × 5.38 × 3.63 mm
L/W Ratio1.49
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Pinpoint
Top View
8.04 mm5.38 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1559160548
Side View
Table 65.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 67.5%

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 6
Current: £5,261 GBP|Low: £2,439 GBP|High: £5,406 GBP|Avg: £3,488 GBP|-2.3%
Queensmith
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
Retailer 15
Retailer 16
November 6, 2026
Retailer 4£2,457 GBP
Retailer 2£2,548 GBP
Retailer 7£2,811 GBP
Retailer 6£2,902 GBP
Retailer 3£2,975 GBP
Retailer 13£3,002 GBP
Retailer 8£3,100 GBP
Retailer 9£3,126 GBP
Retailer 5£3,256 GBP
Retailer 11£3,264 GBP
Retailer 15£3,334 GBP
Retailer 16£3,425 GBP
Retailer 10£3,626 GBP
Retailer 12£3,934 GBP
Retailer 14£5,118 GBP
Queensmith£5,261 GBP

22 data points across 16 retailers

20 retailers£2,457 GBP to £5,118 GBP

B+
Cheapest Retailer
-
£2,457 GBP
B+
Retailer 2
-
£2,548 GBP
View
B+
Retailer 3
-
£2,811 GBP
View
B+
Retailer 4
-
£2,902 GBP
View
B+
Retailer 5
-
£2,975 GBP
View
Final sale: no returns
B+
Retailer 6
-
£3,002 GBP
View
B+
Retailer 7
-
£3,100 GBP
View
B+
Retailer 8
-
£3,103 GBP
View
B+
Retailer 9
-
£3,104 GBP
View
B+
Retailer 10
-
£3,126 GBP
View
Retailer 11
-
£3,256 GBP
View
Price last confirmed 9 days ago
B+
Retailer 12
-
£3,264 GBP
View
B
Retailer 13
-
£3,320 GBP
View
B+
Retailer 14
-
£3,334 GBP
View
B+
Retailer 15
-
£3,425 GBP
View
Retailer 16
-
£3,434 GBP
View
Price last confirmed 29 days ago
B+
Retailer 17
-
£3,626 GBP
View
B
Retailer 18
-
£3,934 GBP
View
B
Retailer 19
-
£5,118 GBP
View
Most Expensive
Queensmith
1559160548 · Oct 28
£5,261 GBP
View
Price last confirmed 9 days ago
19 more retailers have this diamond
Prices start from £2,457 GBPSave up to £2,661 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+
1.20ct Cushion
£2,457 GBP