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Price per carat
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The value of diamonds is always calculated as price/carat.
Market prices depend on the "unit price" of the diamond, and this unit price is specific to each weight, color, clarity etc. So the price of a .25-carat diamond is not a quarter of the price of a 1-carat diamond: a .25-carat diamond has its own unit price, and this will always be proportionally lower than that of a similarly colored 1-carat diamond.
Indicative prices
 F colorless - VVS/VS
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Weight
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$ per carat
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$ per stone
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0.25 ct
|
2,000
|
500
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|
0.50 ct
|
4,000
|
2,000
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1 ct
|
10,000
|
10,000
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2 ct
|
15,000
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30,000
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|
3 ct
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20,000
|
60,000
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 Chocolate brown
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Weight
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$ per carat
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$ per stone
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0.25 ct
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500
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125
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0.50 ct
|
700
|
350
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1 ct
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1,500
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1,500
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2 ct
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2,500
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5,000
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3 ct
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3,500
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10,500
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 Fancy yellow
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Weight
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$ per carat
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$ per stone
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0.25 ct
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3,500
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875
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0.50 ct
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4,500
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2,250
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1 ct
|
7,500
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7,500
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2 ct
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10,000
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10,000
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3 ct
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13,000
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39,000
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 Cognac
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Weight
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$ per carat
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$ per stone
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0.25 ct
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3,000
|
750
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0.50 ct
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4,000
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2,000
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1 ct
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6,500
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6,500
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2 ct
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10,000
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20,000
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3 ct
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25,000
|
75,000
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Note: 3-carat cognac diamonds are extremely rare, and are thus proportionally more expensive than yellow diamonds of the same weight.
 Intense pink
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Weight
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$ per carat
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$ per stone
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0.25 ct
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30,000
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7,500
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0.50 ct
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60,000
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30,000
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1 ct
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150,000
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150,000
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2 ct
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250,000
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500,000
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3 ct
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400,000
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1,200,000
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 Fancy blue
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Weight
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$ per carat
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$ per stone
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0.25 ct
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40,000
|
10,000
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|
0.50 ct
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80,000
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40,000
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1 ct
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135,000
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135,000
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2 ct
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200,000
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400,000
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3 ct
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400,000
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1,200,000
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F colorless - VVS/VS
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Weight
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$ per carat
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$ per stone
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0.25 ct
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2,000
|
500
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0.50 ct
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4,500
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2,250
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1 ct
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11,000
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11,000
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2 ct
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16,000
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32,000
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3 ct
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22,000
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66,000
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Chocolate brown
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Weight
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$ per carat
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$ per stone
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0.25 ct
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750
|
125
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0.50 ct
|
100
|
500
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1 ct
|
2,000
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2,000
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2 ct
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3,000
|
6,000
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3 ct
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4,000
|
12,500
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|
Fancy yellow
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Weight
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$ per carat
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$ per stone
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0.25 ct
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4,500
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875
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|
0.50 ct
|
5,500
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2,250
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|
1 ct
|
8,000
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7,500
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2 ct
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12,500
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25,000
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3 ct
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14,000
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39,000
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Cognac
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Weight
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$ per carat
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$ per stone
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0.25 ct
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3,000
|
750
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0.50 ct
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4,000
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2,000
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1 ct
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8,500
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6,500
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2 ct
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12,000
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20,000
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3 ct
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25,000
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75,000
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Note: 3-carat cognac diamonds are extremely rare, and are thus proportionally more expensive than yellow diamonds of the same weight.
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Intense pink
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Weight
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$ per carat
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$ per stone
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0.25 ct
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40,000
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7,500
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0.50 ct
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100,000
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30,000
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1 ct
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180,000
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150,000
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2 ct
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300,000
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500,000
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3 ct
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500,000
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1,200,000
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Fancy blue
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Weight
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$ per carat
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$ per stone
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0.25 ct
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40,000
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10,000
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0.50 ct
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100,000
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40,000
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1 ct
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180,000
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135,000
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2 ct
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300,000
|
400,000
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3 ct
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500,000
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1,200,000
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Note: blue diamonds weighing less than 1 carat are much rarer than intense pink diamonds and are proportionally more expensive.
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