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.
1. Tourmaline Back to Top. Many people who are not connected with the world of fabulous colored gemstones, will not have even heard of tourmaline. Tourmaline comes in a large range of different colors; green, blue, yellow, pink, watermelon, bi-color, red, purple and even black.