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Cushion|Natural|GIA

1.02ct M SI1 Cushion Natural Diamond

GD • M/SI1 • GIA 2151022020

Certificate GIA 2151022020

Diamond specifications and retailer prices

From £1,746 GBP
As of November 6, 2026
Save £881 GBP (34%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £2,627 GBP at Cape Diamonds · As of November 5, 2026
View at Cape Diamonds

About this 1.02ct natural cushion diamond

This 1.02ct natural cushion sits in the classic one-carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2151022020. Listed at 4 retailers as of November 5, 2026, with prices from £1,746 to £2,627, a £881 spread on the same certified stone. Cape Diamonds lists it at £2,627. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.02
Carat
M
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2151022020
Dimensions6.11 × 5.58 × 3.87 mm
L/W Ratio1.09
Top View
6.11 mm5.58 mm1.02 ctM / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceStrong
CertificateGIA 2151022020
Side View
Table 68.0%CrownGirdle: ThinPavilionCulet: NoneDepth 69.3%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 6
Current: £2,627 GBP|Low: £1,746 GBP|High: £2,646 GBP|Avg: £2,205 GBP|+2.6%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4£1,746 GBP
Retailer 5£1,984 GBP
Retailer 2£2,116 GBP
Retailer 3£2,505 GBP
Cape Diamonds£2,627 GBP

30 data points across 5 retailers

4 retailers£1,746 GBP to £2,627 GBP

C
Cheapest Retailer
-
£1,746 GBP
C
Retailer 2
-
£2,116 GBP
View
C
Retailer 3
-
£2,505 GBP
View
Most Expensive
C
Cape Diamonds
cert_2151022020 · Nov 5
£2,627 GBP
ZAR 56,807 ZAR
View
3 more retailers have this diamond
Prices start from £1,746 GBPSave up to £881 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.

C
1.02ct Cushion
£1,746 GBP