Everything you need to know about Ruby
Ruby is said to offer name, fame, vigor, virtue, warmth and the capacity to command to its user. It can also raise the individual to a higher status. Historically, it has been symbolic of love and passion. This is normally red in color. Ruby is a hot stone.
On diseases front: Ruby helps cure peptic ulcer, fever, rheumatism, gout, etc. However, prolonged use may cause boils, itch, and insomnia. Do consult an astrologer or a gemologist before wearing any stone. Ladies should avoid the use of Ruby as it can destroy the body luster.
The name Ruby comes from Latin ‘Rubrum’, which means ‘Red’. Ruby, which is corundum, is simply crystallized alumina (Al2O3) and in pure form, it is devoid of color. The rich color in Ruby is mainly due to small amounts of chronic oxide that replaces a part of alumina without disturbing the trigonal crystal structure. It has a specific gravity of 3.99. Its Mean Refractive Index is 1.765 and the hardness is 9 on the Moh’s scale.
Natural Ruby stone is never ‘clean’ i.e. it has a few inclusions. They contain inclusions which look like ‘silk’. Natural Ruby encloses small crystals of other minerals in the form of pale angular grains, cavities of irregular shapes, patches of fine needle-like crisscrossing canals that give a silky effect by reflecting light. If these inclusions are not visible to the naked eye, then the eyeglass should be used to detect them.
If even under high magnification, no such inclusions are visible, then the Gem you are checking is, most probably, a piece of glass. A synthetic Ruby either will not contain any inclusions or it will have bubble-like inclusions or cracks, as seen in a glass. The cracks give a milky hue and show an even nature.