The names "semi precious stones" are used for all varieties of gemstones that are not categorized as "precious." Any gemstone suitable for being used in personal adornment would be included.
Semiprecious stones include gemstones fashioned from: agate, amber, amethyst, aquamarine, aventurine, chalcedony, chrysocolla, chrysoprase, citrine, garnet, hematite, jade, jasper, jet, kunzite, lapis lazuli, malachite, moonstone, obsidian, onyx, peridot, rhodonite, sunstone, tiger's-eye, tanzanite, topaz, turquoise, tourmaline and many other materials.
When purchasing a gemstone, we wouldn’t suggest getting too caught up on if the stone is precious versus semi precious. All gemstones are precious, in the sense that if they provide meaning and value to you in a piece of jewelry, they are special! Bare in mind that colors are subjective and a piece of jewelry is emotional.