Simulated Blue Apatite Twisted Three Strand Bead Necklace with Silver-Plated Clasp Three strands of beautiful 4 MM beads - approximately 190 carats 38 grams 18 inches long lobster-claw safety clasp Blue to blue-green apatite mystically stimulates thoughts and ideas. Apatite is used by artists and others to increase their creativity and imagination. With meditation it is used to increase intellect, imagination, and intuitive and psychic awareness. It is said to help you maintain focus, learn, concentrate effectively, think clearly, and communicate better.