Can a person only have one pendulum?

No, there are many kinds. Novices can generally choose white crystal pendulum and amethyst pendulum. After controlling the pendulum at will, they can also choose to change some pendulums with colors and functions they want.

Agate: balance, victory, protection (away from danger/crisis)

Amber: looking for past lives

Amethyst: Develop spiritual strength, strengthen spirituality and healing.

Haihe: Forget your tears, calm down, balance your emotions and protect yourself.

Emerald, Emerald: Improve your mind, strengthen your mind's attention, and find what you have lost.

Blood stone: avoid fraud and be healthy and successful.

Chalcedony: Tourism Safety

Chalcedony: Balance, self-confidence, and staying away from demons.

Grey feldspar (also known as anorthite): It is related to the power of the universe.

Black agate: Resist negative forces.

White crystal: protecting and strengthening the connection with the spiritual world