13th Sign: Ophiuchus is often considered in sidereal astrology because the Sun does pass through this constellation, but it’s not part of the traditional 12-sign zodiac used in Western astrology.

Note on Stones: The concept of birthstones for Ophiuchus is not as standardized as for the traditional zodiac signs since Ophiuchus isn’t part of the tropical zodiac. However, these stones are often associated with Ophiuchus due to their metaphysical properties that align with the characteristics attributed to this sign in sidereal astrology. Amethyst for spirituality and intuition, Citrine for abundance and positivity, Turquoise for healing and communication, Labradorite for transformation and intuition, and Ruby for passion and motivation.