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Cushion|Natural|GIA

1.00ct I SI1 Cushion Natural Diamond

GD • I/SI1 • GIA 6385370928

Certificate GIA 6385370928

Diamond specifications and retailer prices

From £1,315 GBP
As of November 4, 2026
Save £1,564 GBP (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £2,879 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6385370928. Listed at 21 retailers as of November 4, 2026, with prices from £1,315 to £2,879, a £1,564 spread on the same certified stone. MOH London lists it at £2,879. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6385370928
Dimensions6.68 × 5.35 × 3.55 mm
L/W Ratio1.25
Top View
6.68 mm5.35 mm1.00 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6385370928
Side View
Table 60.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 66.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £2,879 GBP|Low: £1,148 GBP|High: £2,921 GBP|Avg: £1,806 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 10£1,148 GBP
Retailer 6£1,315 GBP
Retailer 7£1,493 GBP
Retailer 2£1,598 GBP
Retailer 8£1,693 GBP
Retailer 4£1,790 GBP
Retailer 5£2,010 GBP
Retailer 9£2,025 GBP
Retailer 3£2,046 GBP
MOH London£2,879 GBP

41 data points across 10 retailers

21 retailers£1,315 GBP to £2,879 GBP

B+
Cheapest Retailer
-
£1,315 GBP
B+
Retailer 2
-
£1,339 GBP
View
B+
Retailer 3
-
£1,349 GBP
View
B+
Retailer 4
-
£1,402 GBP
View
B+
Retailer 5
-
£1,404 GBP
View
B+
Retailer 6
-
£1,440 GBP
View
Retailer 7
-
£1,493 GBP
View
Price last confirmed 9 days ago
B+
Retailer 8
-
£1,520 GBP
View
B+
Retailer 9
-
£1,538 GBP
View
B+
Retailer 10
-
£1,598 GBP
View
B
Retailer 11
-
£1,641 GBP
View
B
Retailer 12
-
£1,693 GBP
View
B
Retailer 13
-
£1,733 GBP
View
B
Retailer 14
-
£1,733 GBP
View
B
Retailer 15
-
£1,790 GBP
View
B
Retailer 16
-
£1,793 GBP
View
B
Retailer 17
-
£2,010 GBP
View
Retailer 18
-
£2,025 GBP
View
Price last confirmed 32 days ago
B
Retailer 19
-
£2,046 GBP
View
B
Retailer 20
-
£2,367 GBP
View
Most Expensive
B
MOH London
4AE842D31 · Nov 4
£2,879 GBP
View
20 more retailers have this diamond
Prices start from £1,315 GBPSave up to £1,564 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+
1.00ct Cushion
£1,315 GBP