Vedic Astrology has confirmed for the existence and influence of a total of nine astrological planets. Sun, Moon, Mars, Jupiter, Mercury, Saturn, Venus, Rahu, and Ketu collectively form that group. Then, it has also accepted for the existence and influence of number of gemstones, and their association with different planets. Primarily, the list of stones has been categorized on the grounds of precious and semi-precious stones. The former category belongs to those nine stones which are associated with the nine astrological planets. The latter category comprises rest of all.
Planets and Their Precious Stones
Take a look at the list of precious stones category, and their associated planets.
Astrological Planet (Hindi Name) - Precious Stone
Sun (Surya) - Ruby (Manik)
Moon (Chandra) - White Pearl (Moti)
Mars (Mangal) - Red Coral (Moonga)
Mercury (Budha) - Emerald (Panna)
Jupiter (Guru) - Yellow Sapphire (Pukhraj)
Venus (Shukra) - Diamond (Heera)
Saturn (Shani) - Blue Sapphire (Neelam)
Rahu - Gomedha
Ketu - Cat's Eye (Lahusunia)
This group of stones is also referred as �Navratnas� which refers for �nine precious gems�.
Significance
Irrespective of the category to which different stones belong to, all of them are considered to as auspicious, as they are believed to be comprised of divine powers. These powers are of different nature and different intensities, and thereby every stone which is comprised of them is different from another stone in some or the other way. Astrology also approves them as effective remedial stones for curing different physical and mental health problems. Though, all these aspects of auspiciousness are intrinsically established in them, they actually are not meant to be remunerated by everyone.
It is so primarily because of the distinctive divine powers incorporated in them. The influence and impact that a stone can create is certainly going to be different from the impact created by another stone. As different people have their own distinct needs and aspirations from life as well different people have different sorts of sufferings, one same stone cannot be recommended to all. Also, as one person born at a certain time holds a different destiny and Karma elements from another person born at some other time, therefore two different persons are also not meant to draw a similar impact from one same stone.