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 variety of this crystal is the Green Aventurine. The color of this variety of crystal may also be red and blue and some lesser known colors such as white, brown, peach, pink, orange, yellow and grey. Some colors are really just shades of the other colors.