Round Natural Diamonds
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 66 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Good
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 79451458
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 72791764
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 79914299
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72908406
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 73775705
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72908322
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 70934389
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 75516502
Natural diamond
ROUND 0.44 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70841583
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 71674129
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 72772828
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Very Good
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 73775124
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 73774361
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 79727286
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 77 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 71962767
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70950468
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 77 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 72598417
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 61 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: Strong Blue
Diamond ID: 74427889
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 67 %
Colour: J - Slightly Tinted
Clarity: VS2 - V.Slight Marks
Cut: Very Good
Polish: Good
Symmetry: Good
Fluorescence: None
Diamond ID: 71549123
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 76690852
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 72 %
Colour: J - Slightly Tinted
Clarity: VS2 - V.Slight Marks
Cut: Good
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70952127
Natural diamond
ROUND 0.43 cts.
Sparkle Factor: 73 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72769259
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 64 %
Colour: G - Very White
Clarity: SI2 - Slight Marks
Cut: Good
Polish: Very Good
Symmetry: Good
Fluorescence: Faint Blue
Diamond ID: 73292971
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Excellent
Fluorescence: None
Diamond ID: 73795963
Natural diamond
ROUND 0.42 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 74307153
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 77 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 79735938
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 64 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Very Good
Polish: Very Good
Symmetry: Good
Fluorescence: Faint Blue
Diamond ID: 71701296
Natural diamond
ROUND 0.44 cts.
Sparkle Factor: 61 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Excellent
Fluorescence: Strong Blue
Diamond ID: 74437605
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Very Good
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 73727658
Natural diamond
ROUND 0.45 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 74572607
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 74583821
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Excellent
Fluorescence: None
Diamond ID: 75512134
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 70 %
Colour: J - Slightly Tinted
Clarity: VVS2 - V.V.Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: Strong Blue
Diamond ID: 79591094
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72779108
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 73773283
Natural diamond
ROUND 0.42 cts.
Sparkle Factor: 68 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Very Good
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 73795161
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 77611709
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 59 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Very Good
Polish: Very Good
Symmetry: Very Good
Fluorescence: Strong Blue
Diamond ID: 73727812
Natural diamond
ROUND 0.44 cts.
Sparkle Factor: 77 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 73775201
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 77 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 73796061
Natural diamond
ROUND 0.42 cts.
Sparkle Factor: 75 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 74310492
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 65 %
Colour: J - Slightly Tinted
Clarity: VS2 - V.Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Excellent
Fluorescence: Strong Blue
Diamond ID: 74674626
Natural diamond
ROUND 0.45 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 75793786
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 69 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Very Good
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 79710444
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 73 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 71554499
Natural diamond
ROUND 0.42 cts.
Sparkle Factor: 68 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Very Good
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 71705076
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72781250
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 77 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 72767830
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72777568
Natural diamond
ROUND 0.47 cts.
Sparkle Factor: 75 %
Colour: H - White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 74329014
Natural diamond
ROUND 0.41 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 74576149
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Very Good
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 79450373
Natural diamond
ROUND 0.42 cts.
Sparkle Factor: 77 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 71670251
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 65 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Very Good
Polish: Good
Symmetry: Good
Fluorescence: None
Diamond ID: 71705559
Natural diamond
ROUND 0.42 cts.
Sparkle Factor: 59 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: Strong Blue
Diamond ID: 71790125
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 75 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72795033
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 70 %
Colour: I - Low White
Clarity: SI1 - Slight Marks
Cut: Good
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72764183
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 68 %
Colour: J - Slightly Tinted
Clarity: VS2 - V.Slight Marks
Cut: Very Good
Polish: Good
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 73795893
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Excellent
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 74165270
Natural diamond
ROUND 0.40 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Very Good
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 75793660
Round natural diamonds: what to look for
Cut grade matters most in a round: choose Excellent (GIA) or Ideal/Excellent (IGI) for the most sparkle. Our round diamond guide covers the shape in more detail.
Round diamond sizes and prices
Carat measures weight, not size. These are the typical measurements and lowest prices of the round natural diamonds in our stock today, by carat size:
| Carat | Typical size | Available | From |
|---|---|---|---|
| 1 carat | 6.4 mm | 35,032 | $1,761 |
| 1.5 carat | 7.3 mm | 16,839 | $3,284 |
| 2 carat | 8.0 mm | 7,480 | $8,067 |
| 3 carat | 9.2 mm | 2,258 | $20,519 |
| 5 carat | 11.0 mm | 629 | $67,984 |
Round natural diamond prices
Today our round natural diamonds range from $276 to $5,405,015, across 211,240 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 natural diamond is formed over billions of years and each one is rare; many buyers value that origin. A lab grown diamond of the same grades costs far less. From one carat up, our lowest priced round diamond today is $1,761 natural, against $455 lab grown. Compare round lab grown 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 round diamond?
A 1 carat round diamond typically measures about 6.4 mm across, 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 round natural diamond cost?
Today our round natural diamonds range from $276 to $5,405,015, across 211,240 stones. Carat weight makes the biggest difference, followed by colour, clarity and cut.
Should I choose a natural or lab grown round diamond?
A natural diamond is formed over billions of years and each one is rare; many buyers value that origin. A lab grown diamond of the same grades costs far less. From one carat up, our lowest priced round diamond today is $1,761 natural, against $455 lab grown. Both are graded on the same 4Cs and come with a certificate.
What colour and clarity should a round diamond be?
Cut grade matters most in a round: choose Excellent (GIA) or Ideal/Excellent (IGI) for the most sparkle. 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.
