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Cushion|Natural|GIA

4.02ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1

Certificate GIA 1

Diamond specifications and retailer prices

From £25,160 GBP
As of November 6, 2026
Save £1,473 GBP (6%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £26,634 GBP at DreamStone · As of November 4, 2026
View at DreamStone

About this 4.02ct natural cushion diamond

This 4.02ct natural cushion sits in the three to five 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. Listed at 2 retailers as of November 4, 2026, with a relatively tight 6% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

4.02
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1
Dimensions9.14 × 8.80 mm
L/W Ratio1.04
Top View
9.14 mm8.80 mm4.02 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1
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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Price History

Last verified: Nov 6
Current: £26,634 GBP|Low: £24,912 GBP|High: £26,634 GBP|Avg: £25,995 GBP
DreamStone
Retailer 2
September 23, 2026
Retailer 2£25,160 GBP
DreamStone£26,634 GBP

3 data points across 2 retailers

2 retailers£25,160 GBP to £26,634 GBP

A
Cheapest Retailer
-
£25,160 GBP
Most Expensive
B+
DreamStone
636c1d5776315c1dde599976 · Nov 4
£26,634 GBP
$35,649 USD
View
1 more retailer has this diamond
Prices start from £25,160 GBPSave up to £1,473 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
4.02ct Cushion
£25,160 GBP