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Cushion|Natural|GIA

1.05ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 6542230145

Certificate GIA 6542230145

Diamond specifications and retailer prices

From £640 GBP
As of November 6, 2026
Save £268 GBP (30%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £907 GBP at GemTrove · As of November 6, 2026
View at GemTrove

About this 1.05ct natural cushion diamond

This 1.05ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542230145. Listed at 7 retailers as of November 6, 2026, with prices from £640 to £907, a £268 spread on the same certified stone. GemTrove lists it at £907. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6542230145
Dimensions5.73 × 5.66 × 3.80 mm
L/W Ratio1.01
Top View
5.73 mm5.66 mm1.05 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6542230145
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £907 GBP|Low: £590 GBP|High: £916 GBP|Avg: £751 GBP
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7£640 GBP
Retailer 4£644 GBP
Retailer 3£704 GBP
Retailer 2£723 GBP
Retailer 6£729 GBP
Retailer 5£792 GBP
GemTrove£907 GBP

41 data points across 7 retailers

7 retailers£640 GBP to £907 GBP

A
Cheapest Retailer
-
£640 GBP
A
Retailer 2
-
£644 GBP
View
Final sale: no returns
A
Retailer 3
-
£704 GBP
View
A
Retailer 4
-
£723 GBP
View
A
Retailer 5
-
£729 GBP
View
A
Retailer 6
-
£792 GBP
View
Most Expensive
B+
GemTrove
GT-N-00959194-98 · Nov 6
£907 GBP
A$1,868 AUD
View
6 more retailers have this diamond
Prices start from £640 GBPSave up to £268 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
£640 GBP