Pulsifer, Maine x x Purple apatite from Maine elicits a reverent response among serious mineral collectors. That is because the Smithsonians "Roebling Apatite, Pulsifer, Maine. considered one of the great mineral specimens in the world.
Linarite is known for its electric blue color. Specimens may be mistakenly labeled as Azurite, since both are found in the same localities and can be very similar in appearance. Simple tests can distinguish the two, for their physical properties differ.