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.
Size and production rather than color pattern have been stressed in the development of the French-Alpine. No distinct color has been established, and it may range from pure white through shades of fawn, gray, brown, black, red, bluff, piebald, or various shadings or combinations of these colors.