A pulsar (short for pulsating radio star) is a highly magnetized, rotating neutron star that emits a beam of electromagnetic radiation.
Tourmaline is the most colorful of all gemstones. It occurs in all colors, but pink, red, green, blue and multicolored are its most well-known gem colors. Scientifically, tourmaline is not a single mineral, but a group of minerals related in their physical and chemical properties.
The rarest colors of tourmaline are the unusual blue and green colored stones found only in the Batalha mine in Paraiba, Brazil. These stones, which have been described as having an electric, almost neon glow about them, get their unique color from the presence of copper.