1 Carat Natural Diamonds
PEARSHAPE 1.03 cts.
Sparkle Factor: 65 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 75459110
CUSHION 1.00 cts.
Sparkle Factor: 67 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 71004126
PEARSHAPE 1.00 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 78070756
PEARSHAPE 1.01 cts.
Sparkle Factor: 77 %
Colour: H - White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 71370905
CUSHION 1.00 cts.
Sparkle Factor: 65 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 74746684
OVAL 1.01 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 70340872
OVAL 1.00 cts.
Sparkle Factor: 72 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70325598
OVAL 1.00 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70340746
OVAL 1.00 cts.
Sparkle Factor: 69 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 78363034
CUSHION 1.01 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 70339360
HEART 1.01 cts.
Sparkle Factor: 75 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70036152
CUSHION 1.02 cts.
Sparkle Factor: 64 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: Strong Blue
Diamond ID: 71518066
PRINCESS 1.01 cts.
Sparkle Factor: 54 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: Strong Blue
Diamond ID: 71441133
PRINCESS 1.01 cts.
Sparkle Factor: 62 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: Faint Blue
Diamond ID: 70205932
OVAL 1.04 cts.
Sparkle Factor: 67 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 79829565
PEARSHAPE 1.00 cts.
Sparkle Factor: 69 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 79829605
PEARSHAPE 1.00 cts.
Sparkle Factor: 66 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 72044634
OVAL 1.00 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70340928
CUSHION 1.01 cts.
Sparkle Factor: 74 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 74746621
HEART 1.00 cts.
Sparkle Factor: 72 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Good
Fluorescence: None
Diamond ID: 70902717
PEARSHAPE 1.01 cts.
Sparkle Factor: 74 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Excellent
Fluorescence: None
Diamond ID: 70841040
PEARSHAPE 1.01 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70340284
EMERALD 1.01 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70340361
OVAL 1.01 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70340998
HEART 1.01 cts.
Sparkle Factor: 74 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 70566493
CUSHION 1.00 cts.
Sparkle Factor: 67 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 72757736
ROUND 1.00 cts.
Sparkle Factor: 66 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Good
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 71202387
PEARSHAPE 1.02 cts.
Sparkle Factor: 67 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 70324856
PRINCESS 1.07 cts.
Sparkle Factor: 63 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Good
Symmetry: Good
Fluorescence: None
Diamond ID: 79462786
ASSCHER 1.03 cts.
Sparkle Factor: 70 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 77276542
PEARSHAPE 1.00 cts.
Sparkle Factor: 69 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 77635257
OVAL 1.00 cts.
Sparkle Factor: 67 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 74780822
OVAL 1.00 cts.
Sparkle Factor: 67 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 74746271
PEARSHAPE 1.00 cts.
Sparkle Factor: 69 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 74597989
PRINCESS 1.08 cts.
Sparkle Factor: 63 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Good
Symmetry: Good
Fluorescence: None
Diamond ID: 73128316
HEART 1.00 cts.
Sparkle Factor: 67 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 71004308
PEARSHAPE 1.00 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72638149
OVAL 1.00 cts.
Sparkle Factor: 69 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 77562548
OVAL 1.01 cts.
Sparkle Factor: 67 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 70340865
MARQUISE 1.01 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: Very Slight Blue
Diamond ID: 70537562
OVAL 1.01 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 73425719
CUSHION 1.01 cts.
Sparkle Factor: 71 %
Colour: F - Colourless
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 71521908
PEARSHAPE 1.01 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 78055363
PEARSHAPE 1.01 cts.
Sparkle Factor: 67 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 74840973
CUSHION 1.01 cts.
Sparkle Factor: 77 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 71365332
HEART 1.01 cts.
Sparkle Factor: 65 %
Colour: H - White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: Faint Blue
Diamond ID: 71001453
PEARSHAPE 1.00 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 75611143
CUSHION 1.00 cts.
Sparkle Factor: 75 %
Colour: F - Colourless
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Very Good
Fluorescence: None
Diamond ID: 76577648
PEARSHAPE 1.01 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 73139006
OVAL 1.00 cts.
Sparkle Factor: 72 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 73372204
CUSHION 1.01 cts.
Sparkle Factor: 74 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 70337981
OVAL 1.01 cts.
Sparkle Factor: 70 %
Colour: J - Slightly Tinted
Clarity: SI1 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 70339759
CUSHION 1.00 cts.
Sparkle Factor: 70 %
Colour: H - White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: Faint Blue
Diamond ID: 70340389
CUSHION 1.00 cts.
Sparkle Factor: 79 %
Colour: H - White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Excellent
Fluorescence: None
Diamond ID: 79298837
CUSHION 1.01 cts.
Sparkle Factor: 74 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: Faint Blue
Diamond ID: 75951241
RADIANT 1.00 cts.
Sparkle Factor: 76 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 72469089
PRINCESS 1.00 cts.
Sparkle Factor: 67 %
Colour: I - Low White
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Very Good
Symmetry: Good
Fluorescence: None
Diamond ID: 72351770
PEARSHAPE 1.00 cts.
Sparkle Factor: 73 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Excellent
Fluorescence: None
Diamond ID: 70322847
PEARSHAPE 1.00 cts.
Sparkle Factor: 71 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Very Good
Fluorescence: None
Diamond ID: 77192073
PEARSHAPE 1.00 cts.
Sparkle Factor: 68 %
Colour: J - Slightly Tinted
Clarity: SI2 - Slight Marks
Cut: Fancy
Polish: Excellent
Symmetry: Good
Fluorescence: None
Diamond ID: 78070749
1 carat diamonds: what to expect
One carat is the most popular engagement ring size and the point where a diamond starts to look substantial on the hand. A 1 carat round diamond measures about 6.4 mm across.
How big is a 1 carat diamond in each shape?
Carat measures weight, not size, so the same carat weight looks different in each shape. These are the typical measurements of the 1 carat natural diamonds in our stock today:
| Shape | Typical size | Available | From |
|---|---|---|---|
| Round | 6.4 mm | 34,838 | $1,714 |
| Oval | 7.9 x 5.5 mm | 11,474 | $1,538 |
| Cushion | 6.2 x 5.4 mm | 7,972 | $1,426 |
| Square cushion | 5.7 mm | 3,227 | $1,426 |
| Elongated cushion | 6.6 x 5.2 mm | 3,694 | $1,626 |
| Emerald cut | 6.7 x 4.8 mm | 8,180 | $1,682 |
| Princess cut | 5.5 mm | 4,530 | $1,634 |
| Radiant | 6.5 x 5.0 mm | 3,282 | $1,803 |
| Square radiant | 5.6 mm | 299 | $1,803 |
| Elongated radiant | 6.7 x 5.0 mm | 2,856 | $1,943 |
| Asscher cut | 5.5 mm | 2,166 | $1,728 |
| Marquise | 9.9 x 5.2 mm | 3,865 | $1,751 |
| Heart shaped | 6.9 x 6.0 mm | 4,921 | $1,611 |
| Pear shaped | 8.7 x 5.5 mm | 10,877 | $1,209 |
Choosing a 1 carat diamond
At this size G or H colour and VS2 or SI1 clarity usually look white and clean to the eye, leaving more of your budget for cut and size. Use the shape filter above, or go straight to round, oval, cushion, square cushion, elongated cushion, emerald cut, princess cut, radiant, square radiant, elongated radiant, Asscher cut, marquise, heart shaped or pear shaped.
1 carat diamond prices
Prices step up at the 1.00 carat mark, so a stone just over it carries the "one carat" name for the smallest premium; anything from about 1.20 carats adds visible size.
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. Today the lowest priced 1 carat diamond in our stock is $1,209 natural, against $366 lab grown. Compare 1 carat lab grown diamonds.
Other sizes
Compare natural diamonds at 1.5 carat, 2 carat, 3 carat or 5 carat.
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
Which diamond shape looks biggest at 1 carat?
In our current stock the marquise shows the most surface from above at 1 carat, measuring about 9.9 x 5.2 mm. Elongated shapes such as marquise, oval and pear generally look larger than a round of the same weight.
How much does a 1 carat natural diamond cost?
Today our 1 carat natural diamonds range from $1,209 to $72,012, across 92,159 stones. Colour, clarity, cut and the exact carat weight make the difference.
Should I choose a natural or lab grown 1 carat 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. Today the lowest priced 1 carat diamond in our stock is $1,209 natural, against $366 lab grown. Both are graded on the same 4Cs and come with a certificate.
What colour and clarity should a 1 carat diamond be?
At this size G or H colour and VS2 or SI1 clarity usually look white and clean to the eye, leaving more of your budget for cut and size.
