List of faceted rubies greater than 10-carats in weight

Above is a list of gem-quality faceted rubies greater than 10-carats in weight, arranged in descending order of weights. In this list the number of rubies greater than 100-carats in weight are only three. The number of rubies between 50-100 carats in weight are only four, and the number of rubies between 10-50 carats in weight are 32. Thus as the size of the rubies decrease the frequency increases. If we can have another category of less than 10-carats in weight the frequency will be even much greater than 32. The obvious conclusion we can derive from this observation is that rubies are generally restricted in size. Rubies of more than 100 carats in weight are extremely rare. The main reason for this is that chromium atoms present in the crystal lattice of ruby, that are responsible for the red color of rubies, also interfere with the growth of the crystals, causing cracks and fissures in the crystal. Thus it is extremely rare for a natural ruby to grow to enormous sizes without the crystal structure being disturbed. The presence of flaws and inclusions in rubies is a common occurrence and is a hallmark of its natural origin.

Another important observation that can be made from the above table is that out of 39 rubies listed 32 rubies are of Burmese origin, and only 4 rubies are of Sri Lankan origin. This is more than enough statistical evidence to show that Burma (Myanmar) is the premier source of rubies in the world. Out of the four Sri Lankan rubies listed three are star rubies. In fact Sri Lanka is the main source country in the world renowned for its star rubies, followed by Burma. Out of six star rubies listed 3 are from Sri Lanka and the other three are from Burma.

Out of the 39 rubies listed 11 are of Mogok origin, and the remaining are from other regions of Burma, Sri Lanka, or of unknown origin. This clearly shows that the Mogok region of Burma had been one of the main sources of Ruby in the world.