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Cushion|Natural|GIA

1.00ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 6315745344

Certificate GIA 6315745344

Diamond specifications and retailer prices

From £740 GBP
As of November 4, 2026
Save £884 GBP (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,623 GBP at MOH London · As of November 4, 2026
View at MOH London

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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6315745344. Listed at 15 retailers as of November 4, 2026, with prices from £740 to £1,623, a £884 spread on the same certified stone. MOH London lists it at £1,623. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6315745344
Dimensions5.79 × 5.48 × 3.74 mm
L/W Ratio1.06
Top View
5.79 mm5.48 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6315745344
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.3%

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 4
Current: £1,623 GBP|Low: £740 GBP|High: £1,899 GBP|Avg: £1,057 GBP|-14.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 11£740 GBP
Retailer 7£749 GBP
Retailer 15£771 GBP
Retailer 5£799 GBP
Retailer 13£805 GBP
Retailer 2£862 GBP
Retailer 4£902 GBP
Retailer 12£908 GBP
Retailer 14£908 GBP
Retailer 9£998 GBP
Retailer 10£1,085 GBP
Retailer 6£1,218 GBP
Retailer 8£1,236 GBP
Retailer 3£1,262 GBP
MOH London£1,623 GBP

33 data points across 15 retailers

15 retailers£740 GBP to £1,623 GBP

A
Cheapest Retailer
-
£740 GBP
A
Retailer 2
-
£749 GBP
View
A
Retailer 3
-
£771 GBP
View
A
Retailer 4
-
£799 GBP
View
Retailer 5
-
£805 GBP
View
Price last confirmed 8 days ago
A
Retailer 6
-
£862 GBP
View
B+
Retailer 7
-
£902 GBP
View
B+
Retailer 8
-
£908 GBP
View
B+
Retailer 9
-
£908 GBP
View
A
Retailer 10
-
£998 GBP
View
B+
Retailer 11
-
£1,085 GBP
View
B+
Retailer 12
-
£1,218 GBP
View
B+
Retailer 13
-
£1,236 GBP
View
B+
Retailer 14
-
£1,262 GBP
View
Most Expensive
B
MOH London
9B2A01CB9 · Nov 4
£1,623 GBP
View
14 more retailers have this diamond
Prices start from £740 GBPSave up to £884 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
£740 GBP