Carat weight is about the size of a diamond. In general, the larger a diamond, the more rare and valuable it is. However, other diamonds of less carat weight may have characteristics, which could derive higher value. Note that a one carat diamond is equal to 0.20 grams.
The balance of the 4Cs contribute to the value, brilliance and rarity of a diamond. So the next time you glance upon one, be sure to look beyond its mesmerising sparkle!