Ruby's rich color speaks of love and passion. Rubies range in hue from an orangey red to a purplish red, but the most prized gems are a true red (called 'Pigeon Blood Red') in color. Large sized Rubies are very rare and very valuable.
"It has been said that the Ruby's red glow comes from an internal flame that cannot be extinguished, making a gift of this stone symbolic of everlasting love. With its hardness and durability, it is a perfect engagement gem. And if worn on the left hand, ancient lore has it that the Ruby will bring good fortune to its wearer, too!" from About Birthstones.com http://www.about-birthstones.com/julybirthstone.html
Custom Gem Cutter has Ruby on http://customgemcutter.com