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Cushion|Natural|GIA

1.21ct I SI2 Cushion Natural Diamond

GD • I/SI2 • GIA 5306799709

Certificate GIA 5306799709

Diamond specifications and retailer prices

From £1,328 GBP
HK$13,900 HKD
As of November 1, 2026
Save £1,794 GBP (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,122 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.21ct natural cushion diamond

This 1.21ct natural cushion sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5306799709. Listed at 11 retailers as of October 26, 2026, with prices from £1,328 to £3,122, a £1,794 spread on the same certified stone. MOH London lists it at £3,122. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5306799709
Dimensions6.36 × 5.55 × 3.94 mm
L/W Ratio1.15
Top View
6.36 mm5.55 mm1.21 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5306799709
Side View
Table 57.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 71.1%

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: £3,122 GBP|Low: £1,309 GBP|High: £3,151 GBP|Avg: £1,905 GBP|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 6£1,328 GBP
Retailer 9£1,608 GBP
Retailer 8£1,643 GBP
Retailer 11£1,680 GBP
Retailer 4£1,714 GBP
Retailer 2£1,759 GBP
Retailer 5£1,901 GBP
Retailer 10£1,920 GBP
Retailer 12£1,933 GBP
Retailer 3£2,145 GBP
Retailer 7£2,222 GBP
MOH London£3,122 GBP

26 data points across 12 retailers

11 retailers£1,328 GBP to £3,122 GBP

B+
Cheapest Retailer
-
£1,328 GBP
HK$13,900 HKD
B+
Retailer 2
-
£1,608 GBP
$2,154 USD
View
B+
Retailer 3
-
£1,643 GBP
$2,201 USD
View
Final sale: no returns
B+
Retailer 4
-
£1,680 GBP
$2,251 USD
View
B+
Retailer 5
-
£1,759 GBP
View
B
Retailer 6
-
£1,841 GBP
SGD 3,333 SGD
View
B
Retailer 7
-
£1,901 GBP
View
B
Retailer 8
-
£1,920 GBP
$2,572 USD
View
B
Retailer 9
-
£1,933 GBP
$2,590 USD
View
B
Retailer 10
-
£2,222 GBP
€2,836 EUR
View
Most Expensive
C
MOH London
6F4A4A01C · Oct 26
£3,122 GBP
View
10 more retailers have this diamond
Prices start from £1,328 GBPSave up to £1,794 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+
1.21ct Cushion
£1,328 GBP