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 most common tourmaline colors are pink and the less-exotic shades of green. Additional hues include yellow, colorless (Achroite), dark yellow to brownish black (Dravite), violet (Siberite) and a dark black variety known as Schorl.