Ruby is the magnificent red variety of the multi-colored corundum species, with bright red of body color and fluorescence, supreme hardness and toughness, outstanding brilliance and luster and the highest value of all colored gemstones for the rarity.
Bright red color of ‘Burmese ruby’ from Mogok valley in Myanmar is in the top place in demand. Rubies from Sri Lanka are of higher brilliance, with a trace of violet.
Ruby is named after the Latin word "ruber" for red. Ruby is one of the most expensive gems, large rubies being rarer than comparable diamonds. Many rubies are an essential part of royal insignia and other famous jewelry.