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Cushion|Natural|GIA

1.00ct K SI1 Cushion Natural Diamond

GD • K/SI1 • GIA 2526130826

Certificate GIA 2526130826

Diamond specifications and retailer prices

From £596 GBP
As of November 6, 2026
Save £311 GBP (34%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £907 GBP at GemTrove · As of November 6, 2026
View at GemTrove

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2526130826. Listed at 9 retailers as of November 6, 2026, with prices from £596 to £907, a £311 spread on the same certified stone. GemTrove lists it at £907. 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
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2526130826
Dimensions5.87 × 5.18 × 3.68 mm
L/W Ratio1.13
Top View
5.87 mm5.18 mm1.00 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2526130826
Side View
Table 60.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 71.1%

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: £907 GBP|Low: £547 GBP|High: £907 GBP|Avg: £743 GBP
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6£596 GBP
Retailer 7£653 GBP
Retailer 9£671 GBP
Retailer 3£678 GBP
Retailer 5£719 GBP
Retailer 2£739 GBP
Retailer 4£741 GBP
Retailer 8£744 GBP
GemTrove£907 GBP

19 data points across 9 retailers

9 retailers£596 GBP to £907 GBP

A
Cheapest Retailer
-
£596 GBP
Final sale: no returns
B+
Retailer 2
-
£653 GBP
View
Retailer 3
-
£671 GBP
View
Price last confirmed 109 days ago
B+
Retailer 4
-
£678 GBP
View
B+
Retailer 5
-
£719 GBP
View
B+
Retailer 6
-
£739 GBP
View
B+
Retailer 7
-
£741 GBP
View
B+
Retailer 8
-
£744 GBP
View
Most Expensive
B+
GemTrove
GT-N-00979174-98 · Nov 6
£907 GBP
A$1,868 AUD
View
8 more retailers have this diamond
Prices start from £596 GBPSave up to £311 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
£596 GBP