Sapphires tend to be heavier than diamonds.
Sapphire carat size mm.
For example an approx.
For a true representation of size it is always recommended to measure the sapphire in millimeters mm comparing the size of sapphires with diamonds it is also important to remember that sapphires have a higher specific gravity and they weigh more than diamonds.
The density of the material will also affect the weight.
For example a 6 5 mm round diamond sapphire and opal all cut in the same proportions will all have different weights.
This is because the density of sapphires are different from the density of diamonds or other gemstones.
The diamond with an sg of 3 52 will weigh 1 carat.
Therefore a 1 carat sapphire may look smaller than a 1 carat diamond.
For example a 6 5 mm round diamond sapphire and opal all cut in the same proportions will all weigh different.
These natural white sapphires demonstrate why the carat weight of a sapphire does not always equal the size in mm these 3 ceylon sapphires range from 2 54 ct to just over 3 75 cts even though each sapphire length and width are all almost identical.
Visually sapphires and diamonds of the same carat weight may vary in sizes.
Size weight comparison charts how to use these charts.
A sapphire specific gravity 4 will weigh 1 14 carats.
Sapphire weight and size chart.
The diamond with a specific gravity of 3 52 will weigh 1 carat.