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Cushion|Natural|GIA

1.05ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2175213051

Certificate GIA 2175213051

Diamond specifications and retailer prices

From £4,254 GBP
$5,708 USD
As of October 31, 2026
Save £595 GBP (12%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £6,540 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 2175213051. Listed at 7 retailers as of October 31, 2026, with a relatively tight 14% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2175213051
Dimensions6.38 × 5.88 × 3.91 mm
L/W Ratio1.09
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional clouds are not shown. Pinpoints are not shown.
Top View
6.38 mm5.88 mm1.05 ctF / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2175213051
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 66.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £6,540 GBP|Low: £4,254 GBP|High: £6,618 GBP|Avg: £4,989 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 4£4,254 GBP
Retailer 3£4,372 GBP
Retailer 2£4,848 GBP
MOH London£6,540 GBP

42 data points across 4 retailers

7 retailers£4,254 GBP to £4,848 GBP

B
Cheapest Retailer
-
£4,254 GBP
$5,708 USD
B
Retailer 2
-
£4,372 GBP
View
B
Retailer 3
-
£4,538 GBP
$6,090 USD
View
B
Retailer 4
-
£4,538 GBP
$6,090 USD
View
B
Retailer 5
-
£4,687 GBP
$6,290 USD
View
B
Retailer 6
-
£4,848 GBP
€6,196 EUR
View
Most Expensive
MOH London
93D8ABE47 · Nov 2
£6,540 GBP
View
Price under review
6 more retailers have this diamond
Prices start from £4,254 GBPSave up to £595 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
1.05ct Cushion
£4,254 GBP