Before the twentieth century, diamonds were weighed on balance scales using the carob seed (hence the word carat used today) because they are extremely uniform in weight=1/5 of a gm.

When rough diamonds are cut and polished into finished diamonds, as much as 6o percent of the total carat weight can be lost. The value and price of diamonds rises exponentially with each increase in carat weight due to its rarity.

Diamonds are weighed in metric carats. Five carats is equal to one gram, thus one carat is equal to 0.2 grams. Today, a carat weighs exactly the same in every corner of the world. Carat is divided into 100 points. For example, a 75-point diamond weighs 0.75 carats.

  • 100 points = 1.00ct or 1ct
  • 125 points = 1.25ct or 1¼ct
  • 150 points = 1.50ct or 1½ct

Which carat weight is right for you?

Top Tips

  • If you are on a budget, explore all options as you may be surprised by the amount of choice available.
  • Bear in mind that a diamond may appear larger on a smaller finger e.g. a 2ct diamond solitaire will look much bigger on a size J finger as opposed to a size Q.
  • If the recipient is very active or works with their hands there will be more wear and tear on the ring. Therefore, it is recommended to go for a smaller diamond in a setting that will adequately protect the stone.
  • Due care and consideration should always be taken into account when wearing your fine jewellery.

Carat Size Chart