Rich pigeon blood red Ruby(.50ct, VS, Thai, LGF) hand set in sterling silver on a 22" sterling silver chain. Ruby is the red variety of corundum, colored differently than other corundum because of the presence of chromium. To be a true ruby, corundum gemstones must display a shade of red that falls within a particular range of colors, including pure rich reds and bluish/purplish reds--a variety of shades, really, as long as red is the dominant color, not orange or pink, though rubies from some regions can be slightly pinkish or orangish red. GIA's definition of ruby's color includes a range from medium to dark orangy red to purplish red. There's a fine line between reddish corundum that qualifies as ruby and those stones that should be called pink sapphire, and the line blurs outside the U.S. Most rubies are heat treated to improve their color.Please ask questionsI'm a home based small seller. All my items are one of a kind handmade pieces. I do not buy pre made of mass manufactured finished items. If you want something that looks like it came from a major jewelry store then please go there. If you want one of a kind,Individual,artistic, and unique pieces then look through my store.