Wearing gemstones help in diminishing the inauspicious effect of the planets. Each planet is determined by a specific gemstone and worn after carefully examining a person's horoscope. And if one wears a mix of gemstones they can face a lot of problems in life. Let’s know about the gemstones one should not combine together. they are believed to have certain metaphysical properties that can be used to enhance the positive effects of the planets and mitigate the negative effects. This is based on the belief that there is a correspondence between the planets and the different gemstones.