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Cushion|Natural|GIA

1.03ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 6542121619

Certificate GIA 6542121619

Diamond specifications and retailer prices

From £640 GBP
As of November 6, 2026
Save £281 GBP (31%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £922 GBP at GemTrove · As of November 6, 2026
View at GemTrove

About this 1.03ct natural cushion diamond

This 1.03ct 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 6542121619. Listed at 7 retailers as of November 6, 2026, with prices from £640 to £922, a £281 spread on the same certified stone. GemTrove lists it at £922. 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

1.03
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6542121619
Dimensions5.90 × 5.56 × 3.72 mm
L/W Ratio1.06
Top View
5.90 mm5.56 mm1.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542121619
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £922 GBP|Low: £590 GBP|High: £922 GBP|Avg: £753 GBP
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7£640 GBP
Retailer 4£646 GBP
Retailer 3£705 GBP
Retailer 2£724 GBP
Retailer 6£729 GBP
Retailer 5£793 GBP
GemTrove£922 GBP

41 data points across 7 retailers

7 retailers£640 GBP to £922 GBP

A
Cheapest Retailer
-
£640 GBP
A
Retailer 2
-
£646 GBP
View
Final sale: no returns
A
Retailer 3
-
£705 GBP
View
A
Retailer 4
-
£724 GBP
View
A
Retailer 5
-
£729 GBP
View
A
Retailer 6
-
£793 GBP
View
Most Expensive
B+
GemTrove
GT-N-00959388-98 · Nov 6
£922 GBP
A$1,898 AUD
View
6 more retailers have this diamond
Prices start from £640 GBPSave up to £281 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
1.03ct Cushion
£640 GBP