The opal is a semi-precious form of the silica mineral (silicon dioxide). Unlike usual mineral crystals, it lacks a proper crystalline structure, yet it has clearly defined properties. The word comes from the Sanskrit word upala. Opal is a Gemstone that attracts love, Opal stone is associated with beauty, intellect and good fortune. Opal Gemstones also heals ailments of nervous and immune system, it also purifies blood and kidney systems.