It is very important in colored stone market.
Sapphire ruby gem stone.
The pie chart on this page shows the share of colored stone imports on a dollar value basis that went to the categories of sapphire ruby emerald and all other gemstone varieties during the 2015 calendar year.
It is usually said that there are four precious gemstones in the world.
Thus they ll weigh more than the sizes on the chart.
Ruby is the most popular red gemstone and sapphire is the most popular blue gemstone.
The color of a ruby is due to the element chromium.
For example a 6 5 mm round diamond sapphire and opal all cut in the same proportions will all weigh different.
Typically gem cutters cut colored gemstones with greater volume than diamonds.
You may have heard that rubies and sapphires are essentially the same type of gemstone and that the only difference is color.
The word ruby comes from ruber latin for red.
Ruby is the most valuable variety of the corundum mineral species which also includes sapphire.
Rubies are red and sapphires are not.