Nine valuable gemstones (Ruby, Diamond, Blue Sapphire, Yellow Sapphire, Emerald, Red Coral, Pearl, Cat’s eye, and Hessonite) are combined to form a navratna, which is worn as a single ornament. This auspicious combination, which embodies the energies of nine astrological planets, is strongly advised in vedic astrology to foster career advancement, financial success, and good health.