Choosing your planetary gemstone

Choosing Your Planetary Gem
The Planetary Gemology World is divided into two (2) opposing philosophies, viz., Anukul-vad v/s Pratikul-vad:

ANUKULA-VAD: A gem will act "SAME" as it's planet - So gems should be chosen for Anukul (favorable) planets

PRATIKUL-VAD: A gem will act "OPPOSITE" of it's planet - So gems should be chosen for Pratikul (unfavorable) planets

Anukul Planet's gem choosing method for resorting to or harnessing one's auspicious
(Anukul) planet(s) (exalted, mulatrikona, own sign, benefic, great friend, good house, owner of good house, etc.) based on the concept that lucky planet = lucky gem! In Jyotish there are basically two broad categories of planetary position, viz., favorable (for the chart) - Anukul OR unfavorable (for the chart) - Pratikul. One should avoid their weakness and cultivate their strengths. "Ratna-anukul" means the auspicious gem of the strongest most desirable planet. Example: One has Leo Lagna - their lagna lord is Sun, who is exalted (100% strength) and posited in the 9th house which is all very auspicious. That person would be advised to use a fine ruby, the Sun's gem, to attract or harness his auspicious influence. On the other hand if a person had Saturn debilitated (0% strength) and in the 8th house they would be advised to avoid Saturn's gem blue sapphire and all other Saturnine things or activities. And better still they could donate a blue sapphire to pacify Shanideva. The followers of Anukul-vad believe that the pratikul-graha color is the unlucky color, and to magnify that bad color will simply increase the problems caused by that unlucky Planet. Both methods believe that gems increase cosmic colors of their planets, thus for an Anukuli it is considered to be suicide to increase a pratikul-graha's color. In Anukul there is never a case where a Pratikul (harmful to the chart/native) planet's gem should be worn as it will surely increase the ill fortune; but such gems for a Pratikul planet can be used by
DONATING them - giving them AWAY - according to Shastric directions. A pure anukijli believes that a pratikul-gem is NEVER good to use; it is increasing the cosmic poison, and ill fortune (a person's bad cosmic vibes) should NEVER be increased. —RIGHT

Pratikul Planet's gem choosing method for strengthening or reversing a weak or evil planet,based on the misconception that a `pratikul' (inauspicious) planet is strengthened by wearing it's gem and there by it changesfrom being inauspicious (piatikul) to become auspicious (anukul). ILLOGIC: By providing the gem for a malefic planet, benefic results will follow.Example: A person has Jupiter debilitated and a malefic which is inauspicious or pratikul, but by wearing Jupiter's gem, yellow sapphire or another yellow Jupiter jewel, it is believed that the `weak' (troublesome) Jupiter gets strengthened and REVERSES to become auspicious.Some persons opine that a harmful planet means that the planet's "cosmic color" is weak.The gems for the planets are concentrated essential cosmic color rays; so by wearing the gem for that Pratikul (harmful) color the weak color is strengthened, and when the weak or evil
color is stronger then the harmful influence will be REVERSED. WRONG

Before describing the most popular methods, let me first say that choosing gems which are