Gemstones are often associated with certain planets in astrology, believed to influence the wearer positively. Here are some gemstone recommendations based on planetary associations:

1. Sun (Surya): Ruby is often recommended for the Sun. It’s believed to enhance confidence, vitality, and leadership qualities.

2. Moon (Chandra): Pearl is associated with the Moon. It’s thought to promote calmness, emotional balance, and intuition.

3. Mars (Mangal): Red Coral is connected to Mars. It’s believed to enhance energy, courage, and strength.

4. Mercury (Budha): Emerald is associated with Mercury. It’s said to improve communication, intelligence, and analytical abilities.

5. Jupiter (Brihaspati): Yellow Sapphire is often recommended for Jupiter. It’s believed to bring wisdom, prosperity, and good fortune.

6. Venus (Shukra): Diamond is associated with Venus. It’s thought to enhance love, beauty, and relationships.

7. Saturn (Shani): Blue Sapphire is connected to Saturn. It’s believed to bring discipline, focus, and stability.

8. Rahu: Hessonite Garnet or Gomed is associated with Rahu. It’s believed to protect against negative energies and promote clarity of thought.

9. Ketu: Cat’s Eye or Chrysoberyl is associated with Ketu. It’s thought to bring spiritual growth and protection.

However, please note that the effectiveness of gemstones as per astrology is a matter of belief and might not have scientific backing. It’s advisable to consult with a qualified astrologer or gemologist before making decisions about wearing gemstones for astrological purposes.