RUBY
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Ruby derives its name from the Latin “ruber”, red. While many red gems continued to be called ‘Rubies’ until the progress of gemological science in the eighteenth century, throughout antiquity Ruby, Garnet and Spinel were collectively designated with the term “carbunculus” (‘small coal’ in Latin). Known to the ancient Greeks as “antrax” (live coal), these stones were beautiful intense red gems which, when exposed to the sun, became the color of burning coals.
The quality of the ruby is determined by several factors, the most important being the color. The best ruby has a vivid red color with a slight purple tinge. The most common color tone on the market is dark blood red with small bluish shades. It is famous under the name of Burmese ruby. It is no coincidence that the Burmese type is the best known in the world precisely because of its hue as well as the fineness of the stone.
Ruby is one of the most expensive and rare gems among the known gems, much rarer than the Diamond itself, especially in the more intense and pure reds. If of superior quality and particularly transparent, Rubies can be classified with the acronym AAA. As a dichroic gem (two colors: purple red and orange red), ie pleochroic, even the ‘finest’ ruby will not have more than 80% pure red, with secondary drops of orange, pink, purple and violet.
Clear rubies with no visible inclusions are practically unobtainable. Just like for Alexandrite and Emerald, also in the case of Ruby it is chromium that is responsible for the inclusions. Belonging to type II gems along with Sapphire (gems found in nature with some minor inclusions visible to the naked eye), Ruby normally has more inclusions than Sapphire, albeit smaller. Subtle microscopic inclusions (also called “silk”) in some Rubies can have the effect of distributing the light more delicately, accentuating both its beauty and value.