- Feb 18, 2010
I had had my eye on this cat's eye rutile at the gemtrader for a long while now. I kept procrastinating telling myself that it was too soft, or more of a stone than a gem, too much money....I broke down and bought it last week and I am really glad. Rutile has a dark red body color and an adamantine luster so it looks like polished hematite, silicon, or balls of mercury. The red color can be seen with transmitted light, though with most light reflected off the surface and then what does get in being filtered by the dark body color the red isn't seen often. The refractive index of rutile is greater than diamond 2.6-2.9. The dispersion is higher as well. The dispersion is rarely seen since light has to get and and get back out to show the dispersion. I had no expectation of seeing it in this cat's eye. Turns out the eye itself is exactly where one can see the dispersion. Here following are photos showing the adamantine luster, the red body color and the dispersion of the eye.