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.
Colors range from light pink to red -- you may see commercial versions of red tourmaline that are called Rubellite. Green tourmaline occurs in many shades, too, from pastel stones to the deeper greens that were mistaken for emeralds (the most expensive of today's green tourmaline, which usually contain chromium).