Diamond Rings, Engagement Rings, Polished Diamonds

Diamond Carat refers to a measurement of weight as opposed to size. Originally a 'carab' was a seed which was used as a weight measure - this adaption is where carat derives its name. 1 carat is equal to 100 points; so 75 points is 75% of a carat or 0.75 carat. Carat is the most price sensitive part of a diamond as it refers to the mass and a proportionate size. Diamonds are very rare and as the size and carat weight increase they become very scarce. Low supply of high carat diamonds and high demand has pushed the price equilibrium to high limits.
Half a carat diamonds (0.50ct) are very popular as you get excellent value; once a diamond hits 1 carat, the price increases exponentially to the size. For example a 0.50ct round diamond measures about 5.00mm across the crown or face; if we increase and double the weight to 1.00ct the size increases to about 6.30mm. This example shows that if we double the carat weight we only increase the size by 20% and yet the price will increase by about 3 times. We think the 'sweet spot' for an average income is about 0.50ct to 0.70ct as far as size and price is concerned before diminishing returns really starts to set in. Most ladies like a good size and balancing your budget with the carat weight and the other characteristics of colour, clarity, cut and certification is also important.
Below are some comparison in sizes and although not to scale, it does allow you to see that a 1.00 carat diamond is not twice the size of a 0.50 carat diamond but it is twice the weight and about three-four times the price.