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Cushion|Natural|GIA

1.20ct H SI1 Cushion Natural Diamond

ID • H/SI1 • GIA 5556836886

Certificate GIA 5556836886

Diamond specifications and retailer prices

From £1,920 GBP
HK$20,100 HKD
As of November 1, 2026
Save £2,757 GBP (59%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,678 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 H 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 5556836886. Listed at 19 retailers as of October 28, 2026, with prices from £1,920 to £4,678, a £2,757 spread on the same certified stone. Queensmith lists it at £4,678. 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
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5556836886
Dimensions7.40 × 5.38 × 3.64 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle
Top View
7.40 mm5.38 mm1.20 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5556836886
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.6%

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: £4,678 GBP|Low: £1,901 GBP|High: £4,697 GBP|Avg: £2,764 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
November 2, 2026
Retailer 13£1,920 GBP
Retailer 11£2,013 GBP
Retailer 5£2,251 GBP
Retailer 4£2,285 GBP
Retailer 9£2,332 GBP
Retailer 2£2,464 GBP
Retailer 3£2,550 GBP
Retailer 8£2,634 GBP
Retailer 10£2,640 GBP
Retailer 6£2,674 GBP
Retailer 7£2,957 GBP
Retailer 12£3,134 GBP
Retailer 14£4,287 GBP
Queensmith£4,678 GBP

23 data points across 14 retailers

19 retailers£1,920 GBP to £4,678 GBP

B+
Cheapest Retailer
-
£1,920 GBP
HK$20,100 HKD
B+
Retailer 2
-
£2,013 GBP
₹256,871 INR
View
B+
Retailer 3
-
£2,251 GBP
SGD 4,075 SGD
View
B+
Retailer 4
-
£2,285 GBP
$3,062 USD
View
B+
Retailer 5
-
£2,332 GBP
$3,125 USD
View
Final sale: no returns
B+
Retailer 6
-
£2,382 GBP
$3,191 USD
View
B+
Retailer 7
-
£2,385 GBP
$3,195 USD
View
B+
Retailer 8
-
£2,464 GBP
View
B+
Retailer 9
-
£2,526 GBP
A$5,208 AUD
View
B+
Retailer 10
-
£2,550 GBP
$3,417 USD
View
B
Retailer 11
-
£2,634 GBP
$3,530 USD
View
B+
Retailer 12
-
£2,640 GBP
View
B
Retailer 13
-
£2,674 GBP
SGD 4,842 SGD
View
B
Retailer 14
-
£2,717 GBP
$3,640 USD
View
Retailer 15
-
£2,760 GBP
A$5,689 AUD
View
Price last confirmed 29 days ago
B
Retailer 16
-
£2,957 GBP
€3,773 EUR
View
B
Retailer 17
-
£3,134 GBP
ZAR 67,848 ZAR
View
B
Retailer 18
-
£4,287 GBP
View
Most Expensive
B
Queensmith
5556836886 · Oct 28
£4,678 GBP
View
18 more retailers have this diamond
Prices start from £1,920 GBPSave up to £2,757 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
£1,920 GBP