What are some tips for estimating the price per carat for rubies?

Tips for estimating ruby prices per carrot include measuring gemstone size, inspecting for visible defects and assessing the color of the stone. Color is the most important factor for estimating value. Stones that are pure red or purplish in color often have the highest value per carrot.

Rubies are the most valuable members of the corundum family of gems. Rubies that are Burmese in origin generally have the most value. Low quality rubies may be worth only a few dollars per carrot. Re-cut rubies and custom-cut gemstones are usually estimated as having a higher cost per carat. Ruby prices per carat can increase significantly for larger stones.