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.
Neutral (NOO-trul) colors don't usually show up on the color wheel. Neutral colors include black, white, gray, and sometimes brown and beige. They are sometimes called âearth tones.â. Circus by Georges Seurat. In Circus, Georges Seurat uses many different neutral colors.