Made of fiber optic glass, these beautiful, handmade Tri-Color Cat’s Eye Marble Spheres have a bright streak running through the middle when light hits it. They come in packs of 5 & get their name from the way they refract light, resembling the oblong center of a cat’s eye. These round cabochons are quality grade fiber optic glass with unique, brilliant color bands of blue, Orangish/Red, & Green. Truly impressive to behold, they measure approximately 16mm or close to 5/8th’s of an inch. Perfect for marble games, marble runs, marble racing, or simply to display in your collection. Includes 5 stainless steel, ring style, washer type display stands. These stands will keep your marbles from rolling & will not distract from the marbles. Cat’s eye is a man made, synthetic gemstone material; however, it didn’t start out that way. It was a by-product of a material manufactured for the telecommunications industryphoto optic glass. Tiny hair-like strands of pure glass are drawn from glass rods by a high tech, fiber drawing tower. Some of the glass fibers are more than a mile long & are wound on spools. The strands are used in telecommunications to make photo optic cable that transmits light signals at the speed of light over long distances. Thousands of these hair-sized strands are pressed together under heat & pressure to form thick plates of fiber optic glass. Lapidary artisans use this special chatoyant glass to cut & polish beautiful eggs, spheres, beads, jewelry & art objects. Please be aware that marbles are very difficult to photograph & due to differences in personal settings on computers & hand held devices the colors you see may vary slightly from the color you receive. Lighting such as flash photography can greatly effect the look of a marble as can holding the marble under different types of lighting can make the color look slightly different. We do our absolute best to represent our marbles accurately & true to color, but even the best photography will not display as 100% perfect. 16mm Nimbus Tri-Color | Blue, Red/Orange, Green Cat’s Eye Marble Fiber Optic Spheres - Pack Of 5 With Stands, Round Cabochons