Gemstones are the miracles of nature as they are exceptionally wonderful and have a composite structure. They are also found in different hues and shapes. Astrology calls jewels as 'navaratna' as they are identified with the 9 planets or 'navagraha'. There are many sorts of pearls all through the world however Indian astrologers has affirmed 84 sorts of gems. Ruby is a red-shaded gemstone. Be that as it may, ruby can be of pink, blue and dark shading moreover. It is the hardest pearl of the world, by precious stone only. A unadulterated ruby diffuses its red sparkle when the primary sunray falls on it.