Solar and lunar eclipses are important in personality and mental health when talking about natal charts. Ancient sages were advised to perform religious activities during eclipse periods.
South Asian world used many vibrations or sounds for healing and protection. Some ancient mantras were used to energize talismans and amulets.
Rahu or Ketu falls into the 7th house creating some problems in marriage life, so what happens when Sun or Moon joins with them? These shadow planets create a karmic axis that makes objections in interpersonal relationships including marriage life.
In Sri Lankan ancestral astrology, dark blue sapphire considers removing the evil influence of the planet Saturn. They use very dark blue gemstones which have the same color as a crow to make silver rings as an astrological remedy. Actually from history, Sri Lanka is a land of blue stones.
Bhava or houses are essential in analyzing horoscopes. As well as planets, the power of houses, called bhava bala plays important role in personal life such as marriage, money, or a job.
India, China, and Greece are countries that consider the origin lands of modern astrology. People use this science to determine their fate and future.