Diamond carat weight

Diamonds are priced, bought and sold on their carat weight. A one carat diamond weighs exactly 0.20 grams—there are five carats to a gram. The diamond system of carat weight is decimal and always carried out at two decimal places. The two decimal positions are correctly described as points, for example a 0.33ct diamond is described as a thirty three pointer which put simply means 33% of one carat. Rounding does occur on the third decimal (which should never be shown) but should never be round ups if it means that the diamond achieves a ‘magic weight’ by doing so. A magic weight is a diamond trade term for an exact carat weight that once achieved increases the price of the diamond significantly.

  1. Diamond carat weight - 1/4 ct, 25 points, 4.1 mm
    1/4 ct
    25 points
    4.1 mm
  2. Diamond carat weight - 1/3 ct, 33 points, 4.5 mm
    1/3 ct
    33 points
    4.5 mm
  3. Diamond carat weight - 1/2 ct, 50 points, 5.2 mm
    1/2 ct
    50 points
    5.2 mm
  4. Diamond carat weight - 3/4 ct, 75 points, 5.9 mm
    3/4 ct
    75 points
    5.9 mm
  5. Diamond carat weight - 1 ct, 100 points, 6.5 mm
    1 ct
    100 points
    6.5 mm
  6. Diamond carat weight - 2 ct, 200 points, 8.2 mm
    2 ct
    200 points
    8.2 mm
  7. Diamond carat weight - 3 ct, 300 points, 9.9 mm
    3 ct
    300 points
    9.9 mm

The best example of a magic diamond weight is by far the weight of one carat (1.ooct). Diamonds under this carat weight are significantly cheaper than diamonds at or over this diamond carat weight. The reasoning being that the market prizes weight above all else. At Metal Urges we don’t encourage the purchasing of diamonds on weight alone as diamond weight does not dictate the beauty of a diamond. Carat weight is only an indication of a diamonds face up size, measurement or ‘spread’. A beautifully cut diamond can often be as much as 20% larger visually or by measurement than a lesser cut diamond of the same weight. Metal Urges believe Tasmanian clients in particular understand that diamond weight and diamond beauty are not linked. Metal Urges is Hobart and Tasmania’s largest supplier of ideal and excellent cut GIA certified diamonds in all weights and sizes. Put simply a diamond selected for its beauty rather than its weight makes much more sense—you can’t see a carat weight the same way you can see a truly beautifully cut diamond.