There are some 130 types of stones, minerals and crystals that can be considered semi precious gemstones. Nearly all have been fashioned into beads or pendants for making beaded gemstone jewelry. Examples include amethyst, carnelian, rose quartz, topaz, agate, tiger's eye, jasper, jade, malachite, obsidian, and turquoise. Most stones used in jewelry making are hard, but a few softer minerals are used because of other attractive properties, such as luster. Enjoy our gemstone beads, and look for matching stones in our Gemstone Pendants Collection.