Found in an old box from a jewelry store that closed in the 1980s ~ Package Said " 18x25mm Hematite Cabochons" ~ I've been told that a lot of this is now man-made but since these are at least 35 years old I'm GUESSING they are better than what you could get now ?? I have no idea how to test so .... here they are. Package of eleven. These are fairly heavy weighing appx 7.4 grams each. (81 Grams for 11 of them)