These interactive pages allow you to calculate your relative carat size
using your ruler to measure in millimeters or tenths of an inch as well as
cut, shape and height. It also applies specific gravity to estimate volume before
supplying the resulting carat weight.
Then with the carat size and the gemstone rating a price formula is enacted
to give you an indication of the possible value of your gem.
The cost refers to an average gemstone without flaws.
It reflects average color purity, brightness and medium fire. Prices
are neither retail or wholesale. They approximate average international trading
prices for cut stones as pertaining to our market experience (circa 2012). There are restrictions
regarding small or very large carat sizes as it is impossible to make such estimations
without misleading generalizations. It also takes
into account the gemstones availability and its popular demand.
Look at our section on gem descriptions and ratings as evidenced by our market experience up to 2012.