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Cushion|Natural|GIA

1.20ct D SI2 Cushion Natural Diamond

EX • D/SI2 • GIA 6551358270

Certificate GIA 6551358270

Diamond specifications and retailer prices

From £1,729 GBP
HK$18,100 HKD
As of November 1, 2026
Save £2,745 GBP (61%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,474 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551358270. Listed at 13 retailers as of October 28, 2026, with prices from £1,729 to £4,474, a £2,745 spread on the same certified stone. Queensmith lists it at £4,474. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551358270
Dimensions7.32 × 5.46 × 3.67 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle, Indented Natural
Top View
7.32 mm5.46 mm1.20 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551358270
Side View
Table 65.0%CrownGirdle: VTN-VTKPavilionCulet: NoneDepth 67.1%

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 1
Current: £4,474 GBP|Low: £1,720 GBP|High: £4,564 GBP|Avg: £2,624 GBP|+0.9%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 5£1,729 GBP
Retailer 2£1,822 GBP
Retailer 3£2,100 GBP
Retailer 9£2,123 GBP
Retailer 4£2,403 GBP
Retailer 7£2,407 GBP
Retailer 11£2,410 GBP
Retailer 10£2,485 GBP
Retailer 6£2,693 GBP
Retailer 8£3,851 GBP
Queensmith£4,474 GBP

30 data points across 11 retailers

13 retailers£1,729 GBP to £4,474 GBP

A
Cheapest Retailer
-
£1,729 GBP
HK$18,100 HKD
A
Retailer 2
-
£1,822 GBP
₹232,561 INR
View
A
Retailer 3
-
£2,100 GBP
SGD 3,802 SGD
View
B+
Retailer 4
-
£2,123 GBP
$2,844 USD
View
Final sale: no returns
B+
Retailer 5
-
£2,222 GBP
$2,977 USD
View
B+
Retailer 6
-
£2,403 GBP
View
B+
Retailer 7
-
£2,407 GBP
$3,225 USD
View
B+
Retailer 8
-
£2,410 GBP
SGD 4,364 SGD
View
B+
Retailer 9
-
£2,434 GBP
A$5,018 AUD
View
B+
Retailer 10
-
£2,485 GBP
$3,330 USD
View
B+
Retailer 11
-
£2,693 GBP
€3,436 EUR
View
B
Retailer 12
-
£3,851 GBP
View
Most Expensive
B
Queensmith
6551358270 · Oct 28
£4,474 GBP
View
12 more retailers have this diamond
Prices start from £1,729 GBPSave up to £2,745 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
£1,729 GBP