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Cushion|Natural|GIA

1.00ct K SI2 Cushion Natural Diamond

EX • K/SI2 • GIA 5413612717

Certificate GIA 5413612717

Diamond specifications and retailer prices

From £600 GBP
As of November 6, 2026
Save £1,654 GBP (73%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,254 GBP at Adiamor · As of November 5, 2026
View at Adiamor

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5413612717. Listed at 13 retailers as of November 5, 2026, with prices from £600 to £2,254, a £1,654 spread on the same certified stone. Adiamor lists it at £2,254. 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5413612717
Dimensions5.55 × 5.48 × 4.13 mm
L/W Ratio1.01
Top View
5.55 mm5.48 mm1.00 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5413612717
Side View
Table 58.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 75.3%

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: £600 GBP|Low: £600 GBP|High: £1,587 GBP|Avg: £987 GBP|-4.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1£600 GBP
Retailer 7£622 GBP
Retailer 6£818 GBP
Retailer 9£856 GBP
Retailer 4£859 GBP
Retailer 2£876 GBP
Retailer 5£966 GBP
Retailer 3£1,190 GBP
Retailer 8£1,576 GBP

29 data points across 9 retailers

13 retailers£600 GBP to £2,254 GBP

A
Cheapest Retailer
-
£600 GBP
A
Retailer 2
-
£622 GBP
View
B+
Retailer 3
-
£818 GBP
View
Retailer 4
-
£856 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£859 GBP
View
B+
Retailer 6
-
£863 GBP
View
A
Retailer 7
-
£876 GBP
View
B+
Retailer 8
-
£950 GBP
View
B+
Retailer 9
-
£956 GBP
View
B+
Retailer 10
-
£966 GBP
View
B+
Retailer 11
-
£1,190 GBP
View
Retailer 12
-
£1,576 GBP
View
Price last confirmed 8 days ago
Most Expensive
C
Adiamor
D-51269128 · Nov 5
£2,254 GBP
$3,017 USD
View
12 more retailers have this diamond
Prices start from £600 GBPSave up to £1,654 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
£600 GBP