Square Cushion Lab Grown Diamonds
Lab-grown diamond
CUSHION 0.40 cts.
Sparkle Factor: 83 %
Colour: E - Colourless
Clarity: SI1 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9572451389
Lab-grown diamond
CUSHION 0.45 cts.
Sparkle Factor: 86 %
Colour: D - Best a girl can get
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9579579440
Lab-grown diamond
CUSHION 0.47 cts.
Sparkle Factor: 85 %
Colour: E - Colourless
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 9576671938
Lab-grown diamond
CUSHION 0.41 cts.
Sparkle Factor: 80 %
Colour: D - Best a girl can get
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Good
Symmetry: Good
Fluorescence: None
Diamond ID: 9479273247
Lab-grown diamond
CUSHION 0.48 cts.
Sparkle Factor: 85 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 9576671945
Lab-grown diamond
CUSHION 0.46 cts.
Sparkle Factor: 80 %
Colour: H - White
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9279304936
Lab-grown diamond
CUSHION 0.40 cts.
Sparkle Factor: 86 %
Colour: E - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9376676467
Lab-grown diamond
CUSHION 0.46 cts.
Sparkle Factor: 85 %
Colour: E - Colourless
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9471520291
Lab-grown diamond
CUSHION 0.45 cts.
Sparkle Factor: 85 %
Colour: E - Colourless
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9475225884
Lab-grown diamond
CUSHION 0.41 cts.
Sparkle Factor: 88 %
Colour: E - Colourless
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9478650189
Lab-grown diamond
CUSHION 0.40 cts.
Sparkle Factor: 89 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9571314469
Lab-grown diamond
CUSHION 0.42 cts.
Sparkle Factor: 83 %
Colour: E - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 9371329554
Lab-grown diamond
CUSHION 0.44 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9475213669
Lab-grown diamond
CUSHION 0.44 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9476680415
Lab-grown diamond
CUSHION 0.52 cts.
Sparkle Factor: 86 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 9675213291
Lab-grown diamond
CUSHION 0.66 cts.
Sparkle Factor: 82 %
Colour: F - Colourless
Clarity: SI1 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9679714526
Lab-grown diamond
CUSHION 0.43 cts.
Sparkle Factor: 86 %
Colour: E - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9372342379
Lab-grown diamond
CUSHION 0.49 cts.
Sparkle Factor: 85 %
Colour: E - Colourless
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9479314287
Lab-grown diamond
CUSHION 0.44 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9479579468
Lab-grown diamond
CUSHION 0.45 cts.
Sparkle Factor: 83 %
Colour: E - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9479709704
Lab-grown diamond
CUSHION 0.40 cts.
Sparkle Factor: 91 %
Colour: D - Best a girl can get
Clarity: VVS1 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9577859237
Lab-grown diamond
CUSHION 0.53 cts.
Sparkle Factor: 82 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Good
Symmetry: Good
Fluorescence: None
Diamond ID: 9676671974
Lab-grown diamond
CUSHION 0.91 cts.
Sparkle Factor: 83 %
Colour: E - Colourless
Clarity: SI1 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9878567360
Lab-grown diamond
CUSHION 0.47 cts.
Sparkle Factor: 85 %
Colour: F - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9379312531
Lab-grown diamond
CUSHION 0.47 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9470652100
Lab-grown diamond
CUSHION 0.42 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9476672120
Lab-grown diamond
CUSHION 0.49 cts.
Sparkle Factor: 86 %
Colour: D - Best a girl can get
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9479596660
Lab-grown diamond
CUSHION 0.45 cts.
Sparkle Factor: 89 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9571244267
Lab-grown diamond
CUSHION 0.46 cts.
Sparkle Factor: 86 %
Colour: E - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9372342413
Lab-grown diamond
CUSHION 0.52 cts.
Sparkle Factor: 78 %
Colour: J - Slightly Tinted
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9375623050
Lab-grown diamond
CUSHION 0.46 cts.
Sparkle Factor: 85 %
Colour: E - Colourless
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9379596653
Lab-grown diamond
CUSHION 0.40 cts.
Sparkle Factor: 89 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9471244252
Lab-grown diamond
CUSHION 0.46 cts.
Sparkle Factor: 88 %
Colour: E - Colourless
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9472342421
Lab-grown diamond
CUSHION 0.48 cts.
Sparkle Factor: 86 %
Colour: E - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9479313965
Lab-grown diamond
CUSHION 0.50 cts.
Sparkle Factor: 92 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 9570379072
Lab-grown diamond
CUSHION 0.51 cts.
Sparkle Factor: 85 %
Colour: E - Colourless
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9572342518
Lab-grown diamond
CUSHION 0.52 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9579314161
Lab-grown diamond
CUSHION 0.61 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9678208986
Lab-grown diamond
CUSHION 0.40 cts.
Sparkle Factor: 88 %
Colour: E - Colourless
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9373417761
Lab-grown diamond
CUSHION 0.45 cts.
Sparkle Factor: 86 %
Colour: E - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9374634061
Lab-grown diamond
CUSHION 0.44 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9471529549
Lab-grown diamond
CUSHION 0.49 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9471575164
Lab-grown diamond
CUSHION 0.51 cts.
Sparkle Factor: 82 %
Colour: H - White
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9471577585
Lab-grown diamond
CUSHION 0.43 cts.
Sparkle Factor: 89 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9475623246
Lab-grown diamond
CUSHION 0.41 cts.
Sparkle Factor: 89 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9476672106
Lab-grown diamond
CUSHION 0.49 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9476672162
Lab-grown diamond
CUSHION 0.49 cts.
Sparkle Factor: 86 %
Colour: E - Colourless
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9479314154
Lab-grown diamond
CUSHION 0.49 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9479413254
Lab-grown diamond
CUSHION 0.46 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9479596625
Lab-grown diamond
CUSHION 0.51 cts.
Sparkle Factor: 92 %
Colour: E - Colourless
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 9570286301
Lab-grown diamond
CUSHION 0.53 cts.
Sparkle Factor: 85 %
Colour: E - Colourless
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9578646857
Lab-grown diamond
CUSHION 0.51 cts.
Sparkle Factor: 86 %
Colour: D - Best a girl can get
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9579314238
Lab-grown diamond
CUSHION 0.50 cts.
Sparkle Factor: 86 %
Colour: D - Best a girl can get
Clarity: VS2 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9579596695
Lab-grown diamond
CUSHION 0.56 cts.
Sparkle Factor: 83 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Good
Symmetry: Good
Fluorescence: None
Diamond ID: 9676671987
Lab-grown diamond
CUSHION 0.63 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9678208979
Lab-grown diamond
CUSHION 0.47 cts.
Sparkle Factor: 88 %
Colour: E - Colourless
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9471235369
Lab-grown diamond
CUSHION 0.47 cts.
Sparkle Factor: 89 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9471518813
Lab-grown diamond
CUSHION 0.47 cts.
Sparkle Factor: 89 %
Colour: D - Best a girl can get
Clarity: VVS2 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9471518911
Lab-grown diamond
CUSHION 0.45 cts.
Sparkle Factor: 89 %
Colour: E - Colourless
Clarity: VVS1 - V.V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9476672142
Lab-grown diamond
CUSHION 0.48 cts.
Sparkle Factor: 88 %
Colour: D - Best a girl can get
Clarity: VS1 - V.Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 9476672156
Square cushion lab grown diamonds: what to look for
Every stone here has a length-to-width ratio of 1.08 or under, so it faces up as a square; the photo shows whether it has classic broad facets or a busier crushed-ice sparkle, which the certificate does not grade. Our square cushion diamond guide covers the shape in more detail.
Square cushion diamond sizes and prices
Carat measures weight, not size. These are the typical measurements and lowest prices of the square cushion lab grown diamonds in our stock today, by carat size:
| Carat | Typical size | Available | From |
|---|---|---|---|
| 1 carat | 5.9 x 5.7 mm | 3,444 | £230 |
| 1.5 carat | 6.7 x 6.5 mm | 4,177 | £313 |
| 2 carat | 7.4 x 7.2 mm | 3,613 | £389 |
| 3 carat | 8.4 x 8.2 mm | 2,997 | £601 |
| 5 carat | 10.0 x 9.7 mm | 1,591 | £994 |
Square cushion lab grown diamond prices
Today our square cushion lab grown diamonds range from £133 to £232,942, across 22,849 stones. Carat weight makes the biggest difference, followed by colour, clarity and cut. Prices step up at the whole and half carat marks, so a stone just over 1.00, 1.50 or 2.00 carats gives the size for the smallest premium.
Natural or lab grown?
A lab grown diamond has the same chemistry, hardness and sparkle as a natural diamond, at a fraction of the price, which is why it is a popular way to reach a larger size. From one carat up, our lowest priced square cushion diamond today is £230 lab grown, against £753 natural. Compare square cushion natural diamonds.
Choosing colour and clarity
Up to about 1.5 carats, G or H colour and VS2 or SI1 clarity usually look white and clean to the eye. From 2 carats colour and inclusions are easier to see, so G or better and VS2 or better are worth considering.
Setting your diamond
Every diamond here can be set in an engagement ring, pendant or earrings made to order in our Bourton-on-the-Water workshop, hallmarked in the UK. Browse engagement rings or design your own. If the stone you want is not listed, our team can source it for you.
Your questions answered
How big is a 1 carat square cushion diamond?
A 1 carat square cushion diamond typically measures about 5.9 x 5.7 mm, based on the stones in our stock today. Carat measures weight, not size, so exact measurements are on each stone's certificate.
How much does a square cushion lab grown diamond cost?
Today our square cushion lab grown diamonds range from £133 to £232,942, across 22,849 stones. Carat weight makes the biggest difference, followed by colour, clarity and cut.
Should I choose a natural or lab grown square cushion diamond?
A lab grown diamond has the same chemistry, hardness and sparkle as a natural diamond, at a fraction of the price, which is why it is a popular way to reach a larger size. From one carat up, our lowest priced square cushion diamond today is £230 lab grown, against £753 natural. Both are graded on the same 4Cs and come with a certificate.
What colour and clarity should a square cushion diamond be?
Every stone here has a length-to-width ratio of 1.08 or under, so it faces up as a square; the photo shows whether it has classic broad facets or a busier crushed-ice sparkle, which the certificate does not grade. Up to about 1.5 carats, G or H colour and VS2 or SI1 clarity usually look white and clean to the eye. From 2 carats colour and inclusions are easier to see, so G or better and VS2 or better are worth considering.
