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Cushion|Natural|GIA

1.02ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 5231993457

Certificate GIA 5231993457

Diamond specifications and retailer prices

From £1,223 GBP
HK$12,800 HKD
As of October 31, 2026
Save £1,600 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,823 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.02ct natural cushion diamond

This 1.02ct 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 5231993457. Listed at 14 retailers as of October 29, 2026, with prices from £1,223 to £2,823, a £1,600 spread on the same certified stone. MOH London lists it at £2,823. 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

1.02
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.39°
OriginNatural
Grading LabGIA
CertificateGIA 5231993457
Dimensions5.90 × 5.87 × 3.94 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.90 mm5.87 mm1.02 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231993457
Side View
Table 61.0%Crown 33.7°Girdle: THK-ETKPavilion 40.39°Culet: NoneDepth 67.0%

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: Oct 31
Current: £2,823 GBP|Low: £1,213 GBP|High: £3,351 GBP|Avg: £1,944 GBP|-15.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 2£1,223 GBP
Retailer 5£1,280 GBP
Retailer 10£1,314 GBP
Retailer 11£1,340 GBP
Retailer 14£1,393 GBP
Retailer 4£1,496 GBP
Retailer 3£1,582 GBP
Retailer 12£1,582 GBP
Retailer 13£1,634 GBP
Retailer 8£1,758 GBP
Retailer 9£1,956 GBP
Retailer 7£2,041 GBP
Retailer 6£2,101 GBP
MOH London£2,823 GBP

43 data points across 14 retailers

14 retailers£1,223 GBP to £2,823 GBP

A
Cheapest Retailer
-
£1,223 GBP
HK$12,800 HKD
A
Retailer 2
-
£1,280 GBP
$1,715 USD
View
A
Retailer 3
-
£1,314 GBP
$1,761 USD
View
A
Retailer 4
-
£1,340 GBP
$1,796 USD
View
Final sale: no returns
A
Retailer 5
-
£1,393 GBP
$1,866 USD
View
A
Retailer 6
-
£1,496 GBP
$2,005 USD
View
A
Retailer 7
-
£1,582 GBP
$2,120 USD
View
A
Retailer 8
-
£1,582 GBP
$2,120 USD
View
A
Retailer 9
-
£1,634 GBP
$2,190 USD
View
A
Retailer 10
-
£1,758 GBP
View
B+
Retailer 11
-
£1,956 GBP
$2,621 USD
View
B+
Retailer 12
-
£2,041 GBP
€2,605 EUR
View
Retailer 13
-
£2,101 GBP
A$4,331 AUD
View
Price last confirmed 24 days ago
Most Expensive
B
MOH London
650C56878 · Oct 29
£2,823 GBP
View
13 more retailers have this diamond
Prices start from £1,223 GBPSave up to £1,600 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
1.02ct Cushion
£1,223 GBP