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Cushion|Natural|GIA

1.05ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6551000742

Certificate GIA 6551000742

Diamond specifications and retailer prices

From £1,145 GBP
HK$12,000 HKD
As of November 2, 2026
Save £1,383 GBP (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £2,528 GBP at MOH London · As of November 1, 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 6551000742. Listed at 20 retailers as of November 1, 2026, with prices from £1,145 to £2,528, a £1,383 spread on the same certified stone. MOH London lists it at £2,528. 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
OriginNatural
Grading LabGIA
CertificateGIA 6551000742
Dimensions5.96 × 5.92 × 3.88 mm
L/W Ratio1.01
Top View
5.96 mm5.92 mm1.05 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551000742
Side View
Table 65.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 65.5%

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: £2,528 GBP|Low: £1,126 GBP|High: £2,657 GBP|Avg: £1,648 GBP|-4.9%
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
November 2, 2026
Retailer 14£1,145 GBP
Retailer 17£1,227 GBP
Retailer 3£1,261 GBP
Retailer 6£1,282 GBP
Retailer 12£1,341 GBP
Retailer 2£1,343 GBP
Retailer 9£1,358 GBP
Retailer 11£1,398 GBP
Retailer 13£1,401 GBP
Retailer 8£1,448 GBP
Retailer 16£1,471 GBP
Retailer 7£1,608 GBP
Retailer 18£1,609 GBP
Retailer 5£1,803 GBP
Retailer 4£2,004 GBP
Retailer 10£2,358 GBP
Retailer 15£2,400 GBP
MOH London£2,528 GBP

22 data points across 18 retailers

20 retailers£1,145 GBP to £2,528 GBP

A
Cheapest Retailer
-
£1,145 GBP
HK$12,000 HKD
A
Retailer 2
-
£1,227 GBP
$1,646 USD
View
Final sale: no returns
A
Retailer 3
-
£1,261 GBP
$1,692 USD
View
A
Retailer 4
-
£1,282 GBP
$1,720 USD
View
A
Retailer 5
-
£1,341 GBP
$1,799 USD
View
A
Retailer 6
-
£1,343 GBP
€1,717 EUR
View
A
Retailer 7
-
£1,358 GBP
$1,822 USD
View
A
Retailer 8
-
£1,398 GBP
A$2,886 AUD
View
A
Retailer 9
-
£1,401 GBP
$1,880 USD
View
A
Retailer 10
-
£1,448 GBP
$1,943 USD
View
A
Retailer 11
-
£1,471 GBP
$1,973 USD
View
A
Retailer 12
-
£1,608 GBP
$2,158 USD
View
A
Retailer 13
-
£1,609 GBP
View
B+
Retailer 14
-
£1,651 GBP
A$3,408 AUD
View
B+
Retailer 15
-
£1,803 GBP
ZAR 39,095 ZAR
View
Retailer 16
-
£1,853 GBP
A$3,825 AUD
View
Price last confirmed 27 days ago
B+
Retailer 17
-
£2,004 GBP
€2,561 EUR
View
Retailer 18
-
£2,358 GBP
$3,165 USD
View
Price last confirmed 9 days ago
B+
Retailer 19
-
£2,400 GBP
$3,220 USD
View
Most Expensive
B+
MOH London
66B4FE87B · Nov 1
£2,528 GBP
View
19 more retailers have this diamond
Prices start from £1,145 GBPSave up to £1,383 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
£1,145 GBP