Important things to consider before deciding a GEM Stone to be worn:

Some people suggest the first alphabet of the name or birth date as the parameter to wear a gemstone, however if the name is kept at based on location of Moon (some people keep the name just like that). Moon can be in the 8th house or be ashtmesh or name rashi (zodiac) can be ashtmesh / be in the 8th house… in this case the gem stone can cause harm!

Some astrologers suggest wearing a pearl for temperament without considering the horoscope in total however if during the time of the birth the moon is ashtmesh or in 6, 8, 12 house then it will cause harm, people suffering from depression will land up in extreme depression. Thus it is important that we first prepare a kundli/horoscope based on birth date, time, location and consider a gem stone considering lagna, panchmesh, navmesh or look at yogkaarak planet. Position of panchmesh and navmesh in horoscope is very important before considering a Gemstone.

This implies that on the face of it a gemstone might look appropriate but it can produce negative results if factors such as lagna, panchmesh and navmesh are not considered before considering a gem stone.