CaratHunter
Plans
Cushion|Natural|GIA

1.05ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6542758912

Certificate GIA 6542758912

Diamond specifications and retailer prices

From £1,183 GBP
HK$12,400 HKD
As of November 2, 2026
Save £1,471 GBP (55%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £2,654 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.05ct natural cushion diamond

This 1.05ct natural cushion sits in the classic one-carat band, graded F 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 6542758912. Listed at 22 retailers as of November 2, 2026, with prices from £1,183 to £2,654, a £1,471 spread on the same certified stone. MOH London lists it at £2,654. 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

1.05
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6542758912
Dimensions5.92 × 5.90 × 3.88 mm
L/W Ratio1.00
Top View
5.92 mm5.90 mm1.05 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542758912
Side View
Table 64.0%CrownGirdle: STK-VTKPavilion 40.6°Culet: NoneDepth 65.9%

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 2
Current: £2,654 GBP|Low: £1,164 GBP|High: £2,725 GBP|Avg: £1,635 GBP|-2.6%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 2, 2026
Retailer 15£1,183 GBP
Retailer 19£1,266 GBP
Retailer 3£1,300 GBP
Retailer 6£1,323 GBP
Retailer 13£1,346 GBP
Retailer 4£1,362 GBP
Retailer 9£1,399 GBP
Retailer 12£1,428 GBP
Retailer 2£1,436 GBP
Retailer 14£1,453 GBP
Retailer 16£1,478 GBP
Retailer 8£1,490 GBP
Retailer 18£1,510 GBP
Retailer 10£1,575 GBP
Retailer 7£1,660 GBP
Retailer 20£1,662 GBP
Retailer 5£1,862 GBP
Retailer 17£2,068 GBP
Retailer 11£2,427 GBP
MOH London£2,654 GBP

18 data points across 20 retailers

22 retailers£1,183 GBP to £2,654 GBP

A
Cheapest Retailer
-
£1,183 GBP
HK$12,400 HKD
A
Retailer 2
-
£1,266 GBP
$1,699 USD
View
Final sale: no returns
A
Retailer 3
-
£1,300 GBP
$1,744 USD
View
A
Retailer 4
-
£1,323 GBP
$1,775 USD
View
A
Retailer 5
-
£1,346 GBP
$1,806 USD
View
A
Retailer 6
-
£1,362 GBP
€1,740 EUR
View
A
Retailer 7
-
£1,399 GBP
$1,877 USD
View
A
Retailer 8
-
£1,428 GBP
$1,916 USD
View
A
Retailer 9
-
£1,436 GBP
A$2,965 AUD
View
A
Retailer 10
-
£1,453 GBP
$1,950 USD
View
A
Retailer 11
-
£1,478 GBP
View
A
Retailer 12
-
£1,490 GBP
$2,000 USD
View
A
Retailer 13
-
£1,510 GBP
$2,027 USD
View
Retailer 14
-
£1,575 GBP
$2,113 USD
View
Price last confirmed 13 days ago
A
Retailer 15
-
£1,660 GBP
$2,228 USD
View
A
Retailer 16
-
£1,662 GBP
View
B+
Retailer 17
-
£1,694 GBP
A$3,498 AUD
View
B+
Retailer 18
-
£1,862 GBP
ZAR 40,368 ZAR
View
Retailer 19
-
£1,912 GBP
A$3,947 AUD
View
Price last confirmed 27 days ago
B+
Retailer 20
-
£2,068 GBP
€2,643 EUR
View
Retailer 21
-
£2,427 GBP
$3,257 USD
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
31D2616AE · Nov 2
£2,654 GBP
View
21 more retailers have this diamond
Prices start from £1,183 GBPSave up to £1,471 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
1.05ct Cushion
£1,183 GBP