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.
Since it shares the same excellent gemstone characteristics with the other varieties of tourmaline, it is a superb value gemstone. Other common tourmaline colors that are not particularly expensive include yellow-green, brown and orange.ot all tourmaline gems have the same value. Some varieties are especially rare and desirable, while others are almost as inexpensive as quartz. Interposed between these are a range of fascinating colors that represent some of the best value gemstones. Here's a quick guide to tourmaline value.