Psychic Abilities, Clarity
 
Apatite is a calcium phosphate mineral found in a variety of colors such as yellow, blue, green, gray, and brown.
 
Blue Apatite is a stone of manifestation attuned to the future, activating psychic abilities and allowing expansion of knowledge. Apatite will stimulate the intellect and brings ideas from the mind down into the earth realm through realizations.
 
Third Eye, Gemini, Capricorn, Pisces 
https://thecrystalcouncil.com/crystals/apatite