It is said that Blue Apatite can promote motivation and independence. Apatite can be very brittle and have a hardness of 5 on the MOHS scale. For these reasons they should be used in perhaps a pendant or earrings, as a ring is more likely to get knocked and damaged. Their beautiful color is quite irresistable and could be just what your next piece of jewelry needs. This Merelani material has a beautiful teal blue color weighs 4.20 cts. and measures 9x8x7 mm.