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Cushion|Natural|GIA

0.90ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 1555245420

Certificate GIA 1555245420

Diamond specifications and retailer prices

From £644 GBP
HK$6,700 HKD
As of October 29, 2026
Save £881 GBP (58%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,525 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.9ct natural cushion diamond

This 0.9ct natural cushion sits in the just-under-one-carat band, graded E 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 1555245420. Listed at 14 retailers as of October 29, 2026, with prices from £644 to £1,525, a £881 spread on the same certified stone. MOH London lists it at £1,525. 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

0.90
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.3°
Pavilion angle34.9°
OriginNatural
Grading LabGIA
CertificateGIA 1555245420
Dimensions5.82 × 5.55 × 3.61 mm
L/W Ratio1.05
Top View
5.82 mm5.55 mm0.90 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555245420
Side View
Table 66.0%Crown 34.3°Girdle: THN-THKPavilion 34.9°Culet: NoneDepth 65.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £1,525 GBP|Low: £644 GBP|High: £1,599 GBP|Avg: £971 GBP|-4.7%
MOH London
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
October 30, 2026
Retailer 11£644 GBP
Retailer 9£692 GBP
Retailer 3£777 GBP
Retailer 10£801 GBP
Retailer 4£819 GBP
Retailer 12£849 GBP
Retailer 13£909 GBP
Retailer 7£939 GBP
Retailer 8£944 GBP
Retailer 5£946 GBP
Retailer 2£1,036 GBP
Retailer 6£1,190 GBP
Retailer 14£1,206 GBP
MOH London£1,525 GBP

31 data points across 14 retailers

14 retailers£644 GBP to £1,525 GBP

A
Cheapest Retailer
-
£644 GBP
HK$6,700 HKD
A
Retailer 2
-
£692 GBP
$922 USD
View
Final sale: no returns
A
Retailer 3
-
£777 GBP
$1,035 USD
View
A
Retailer 4
-
£801 GBP
$1,067 USD
View
A
Retailer 5
-
£819 GBP
$1,091 USD
View
A
Retailer 6
-
£849 GBP
$1,130 USD
View
A
Retailer 7
-
£909 GBP
$1,210 USD
View
A
Retailer 8
-
£939 GBP
$1,250 USD
View
A
Retailer 9
-
£944 GBP
View
A
Retailer 10
-
£946 GBP
$1,260 USD
View
A
Retailer 11
-
£1,036 GBP
$1,380 USD
View
Retailer 12
-
£1,190 GBP
A$2,439 AUD
View
Price last confirmed 29 days ago
A
Retailer 13
-
£1,206 GBP
€1,529 EUR
View
Most Expensive
B+
MOH London
59727E12C · Oct 29
£1,525 GBP
View
13 more retailers have this diamond
Prices start from £644 GBPSave up to £881 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
0.90ct Cushion
£644 GBP