Lapis lazuli is a semi-precious stone that has many meanings, including:

Spiritual
It's considered a spiritual stone that connects the physical and celestial planes. It's believed to help with spiritual growth, connecting with guardian spirits, and opening the third eye.

Protection
It's thought to protect against mental and physical attacks, and is considered a good stone for overcoming trauma.

Communication
It's said to help with clear thinking, communication, and creative imagination. Writers often wear it because it's believed to help with the flow of writing energies.

Relationships
It's known as the stone of truth and friendship, and is believed to bring harmony, love, and protection to relationships.

Royalty
It's associated with royalty, strength, and courage.

Good luck
In the 18th century, lapis lazuli could stand for "good luck" or "love me" in the symbolic "gem language" used in royal courts.

Starry night
In ancient Persia and pre-Columbian America, it was a symbol of the starry night.

Evil eye
In the Islamic Orient, it was favored for protection from the evil eye.