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Cushion|Natural|GIA

1.00ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 6555587046

Certificate GIA 6555587046

Diamond specifications and retailer prices

From £1,135 GBP
As of November 6, 2026
Save £1,382 GBP (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,188 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555587046. Listed at 13 retailers as of November 2, 2026, with a 122% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6555587046
Dimensions6.53 × 4.74 × 3.28 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Pinpoint, Indented Natural
Top View
6.53 mm4.74 mm1.00 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6555587046
Side View
Table 69.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 69.1%

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 6
Current: £3,188 GBP|Low: £1,135 GBP|High: £3,321 GBP|Avg: £1,821 GBP|-4.0%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 2£1,135 GBP
Retailer 5£1,326 GBP
Retailer 3£1,342 GBP
Retailer 10£1,382 GBP
Retailer 4£1,386 GBP
Retailer 6£1,393 GBP
Retailer 13£1,539 GBP
Retailer 9£1,560 GBP
Retailer 11£1,581 GBP
Retailer 8£1,753 GBP
Retailer 7£1,951 GBP
Retailer 12£2,517 GBP
Queensmith£3,188 GBP

23 data points across 13 retailers

13 retailers£1,135 GBP to £2,517 GBP

A
Cheapest Retailer
-
£1,135 GBP
A
Retailer 2
-
£1,326 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,342 GBP
View
A
Retailer 4
-
£1,382 GBP
View
A
Retailer 5
-
£1,386 GBP
View
A
Retailer 6
-
£1,393 GBP
View
A
Retailer 7
-
£1,539 GBP
View
A
Retailer 8
-
£1,560 GBP
View
B+
Retailer 9
-
£1,581 GBP
View
B+
Retailer 10
-
£1,753 GBP
View
B+
Retailer 11
-
£1,951 GBP
View
B
Retailer 12
-
£2,517 GBP
View
Most Expensive
Queensmith
6555587046 · Oct 28
£3,188 GBP
View
Price last confirmed 9 days ago
12 more retailers have this diamond
Prices start from £1,135 GBPSave up to £1,382 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
1.00ct Cushion
£1,135 GBP