Something precious, to be cared for and guarded with due diligence.
The gem of truth. Facts revealing themselves.
Commitments and devotion. Precious gems, especially diamonds, are exchanged as part of engagement or wedding rites.
In a ring: Authority. Popes, kings, and other authority figures often wear gold rings mounted with precious gems as a sign of office.
Metaphysically: Assisted health, protection, or improved personal characteristics. People in nearly every ancient culture carried or wore precious gems as amulets, charms, and talismans for a variety of positive purposes.
Each precious or semiprecious gem carries different meanings within a dream. Amber equates to feeling trapped, diamonds are for love, emeralds represent resourcefulness, and garnets portend the end to a period of questioning. Additionally, jade indicates health, moonstone stands for foresight and all things feminine, opal represents financial
situations, ruby is a type of fire dream, and sapphire shows faithfulness on your part.
For more ideas along these lines, try reading my book Folkways or any book that includes the lore of gems.
Faceted gems represent different aspects in something or someone, including the Divine and yourself.